Now, Installous, probably most popular app allowing you to install apps from third-party sources and sometimes just pirated apps has shut down blaming “stagnant” forums that are hard to moderate.
And while Apple might consider this a victory, Installous is not the only app of this sort. And while it required jailbreak, other similar options are now appearing that do not require any kind of hacking of your device. Apps like Zeusmos and Kuaiyong allow one-tap installing of third-party apps and even sideloading pirated apps.
Times are changing, but it seems that there will always be ways to circumvent the limitations of app stores, and as long as this does not involve piracy, it should be all fine.