This deal is available only from LG's official US website (see the first source link below), and seems to include only the titan version of the V20 - if you're selecting the silver model, the free microSD card does not show up next to it. This is a limited time offer that's available "while supplies last."
To be fair, the unlocked LG V20 came with freebies since the first day of release in the US. Retailers Newegg and B&H are still offering freebies with the purchase of an unlocked V20, including LG G Pad tablets, headphones, and power banks. You can check out their deals at the second and third source links below.
Are you tempted to buy an LG V20, now that 2017 is near and we're about to see newer high-end smartphones hitting the market?
sources: LG, Newegg, B&H