QUestion about how to join steamgifts.com

https://www.steamgifts.com/about/faq

"Games that have been accessible through bundles, or games that were once available for free due to promotions or pricing errors are not included in this calculation. "

Games from bundles do not count toward that 100.Also the boxed version of fallout 4 still uses steam and the box version actually does not have all the files a way to help combat piracy so you will need Steam to finish downloading the game.

The same for Xcom 2 it is Steam works so it requires steam regardless if you bought it retail or on Steam.
GTA V on the other hand has a steam version and social club version and only the Steam version can be bought on Steam all other versions use social club to download.

So either you are misinformed or your friend is a liar or a pirate if he is playing it.as it should still show on his account if he bought the games in a boxed version or if using family share it should still show hours logged and chevos unlocked...GTA V is the only one that depends on how they purchased if it will show on Steam or not only buying on Steam gets you GTA V all other versions are social club only but even the Steam version needs social club to play just uses Steam for updates and download

That hard copy cannot be on PC then, as your little list above is Steam exclusive on PC. Or hard copy as in hardly copied from a torrent file. :)