There's over $2 billion in this article and that's crazy, or is it?

Remember the recent Waze acquisition by Google? The user-generated mapping service set Mountain View back a cool $1.1bn, while, in comparison, the social-mapper makes nickels in the form of ad revenue. Joining up with the paragon of advertising, though, we see a bright future for Waze and its 44 million total users. We say savvy - Google+ integration is bound to follow, and although much less popular than Facebook, we expect the networking effect and its parent company's expertise in advertising to balloon Waze's popularity and therefore – its ad revenue. What's more, 1 in 4 Google searches is related to location reinforcing Waze CEO, Noam Bardin's punch line - “What search is for the Web, maps are for mobile”. Will Waze on itself break even on Google's investment? That's much less clear. All we're saying is that the acquisition will further cement the search giant's hold on providing the best maps experience, and that's worth significantly north of a billion.

Just a month after its initial IPO, Facebook announced it'll acquire Instagram for a sensational $1bn (they actually only got $735m by the time the deal was closed, compliments of Facebook's crashing stock). At the time, Instagram was a company with some 30 million users, zero revenue, no known strategy to monetize its services and already facing competition. As of today, Instagram is yet to find a legitimate one. So, crazy or savvy? We call savvy. The undeniable networking effect that's been in play since Instagram got integrated with Facebook and ballooned to over 130 million total users, and with rumors that we're about to see video ads become part of the app's latest service, Facebook's acquisition does seem to have a lot going for it. Sure, unlike most other apps in the list, it's its parent feeding value into it, not the other way around. Regardless, the space is definitely up for disruption and competition is there. That said, having the world's biggest social network behind you means any potential rival will have to either buckle up in a similar fashion or seriously out-innovate the duo to make a dent. Until then, its smooth sailing ahead.

Speaking of networking and videos, both Yahoo! and Twitter have gone bonkers for viral video-sharing apps – Qwiki and Vine, respectively. CEO Marissa Mayer got the shorter end of the stick, for Yahoo!'s acquisition of Qwiki was a tad pricier at a reported $50 million, whereas the significantly more popular Vine cost Dick Costolo and Co. a more frugal $30 million. So why do we think the duo above made for a savvy investment? Both of these sit at the very busy, but promising, intersection of mobile, video and advertising. Furthermore, the price-to-(prospective) earnings ratio is through the roof, especially compared to Instagram's. It's also probably noteworthy that Facebook seems to be preparing to spearhead the video ads model on its own territory, succeeding in which will equal a beaten path for the above to traverse.

Video-sharing apps aside, did you know that Dropbox purchased the iOS exclusive Mailbox for $100 million, and that's not even the most disturbing part about it? No, the really disturbing part was the fact that the app had been out in the wild for just a month and is free. Yes, despite the hype and the extensive reservation list (Mailbox has been scaling its service by easing in a set amount of new users at their own pace), the start-up doesn't even appear to have monetization within its priorities at all. And even if it does, apart from a subscription method, we don't quite see how the company will make enough dough to deserve its price tag. We call crazy – the company will need a huge amount of subscribers to make up for Dropbox's obscene investment, and all that is at constant peril as much bigger players like Google and Microsoft can step up to the challenge at any point. That's particularly important, as we haven't heard of Mailbox intending to patent gestures, which really is what it will need in order to preserve its competitive advantage. What's more, now Google owned competitor, Sparrow, was acquired for a much more economical 'under $25 million', reportedly, and that's with the app having at least some form of a revenue model – the app goes for $2.99 (it used to cost $9.99 back in the days).

Ah, news aggregators. There's something about them that makes tech companies reach for their wallets and cough up some serious cash, and we think we know what. Know Pulse? A cheeky $90 million, reportedly, is what it cost LinkedIn to get its hands on the news agreggator, and our verdict is precluded by Pulse's rapid success – the app had over 20 million users at the end of 2012, and claimed it was making $300,000 a month via sponsored content while simply testing the surface. We call savvy.

Google and Yahoo!, lest they feel left behind, have also joined in on the fun. Yahoo! purchased Summly for a reported $20 million for the app and the talent behind it and Google quickly followed suite by acquiring Seattle-based Wavii, yet another news reader for a reported $30 million. But both Summly and Wavii got shut down almost immediately after being purchased, so what's the deal? Well, what Google and Yahoo! did is simply acquire the talent behind the startups, and in the case of Wavii – the patents it held, within which is a granted application on Open Information Extraction on the Web, a paradigm shift said to be the future of search. Sounds interesting? Check the video below, and you'll better understand why a mere $20-30 million (for Google and Yahoo!, that is) is a savvy investment that feeds disproportionately more value back to the parent. 

So how crazy is the tech industry? Surprisingly, not as much as we initially thought. Are they fail-proof? Of course not! But the fact remains, if you think about it: being savvy at what they do more often than not is the reason you know the names of these companies by heart, in the first place.

Yes, sure - none of this is set in stone. But we felt some may be missing a key point with these acquisitions. A noteworthy consideration when viewing these buyouts is the fact that the talent behind these already successful start-ups is also retained by the buyer, and from this flows our next point. Namely, these apps do not necessarily need to break even on their own – they need simply feed back enough value to the mother-ship in order to qualify as a successful investment.