Not activated Gifts on account iv4o0412
Before calling out / reporting someone, please manually check the results
As a general rule, check if SteamCommunity and SteamGifts are online.
Also check if user profile is not private (If it's private ask a Support Member to check it for you).
As you'll read on each section, steam API has some bugs that may result in an inaccurate non-activated detection
Games wins not activated
There are some rare cases where some base steam games are not recognized as owned. This site uses a whitelist for not showing those games, if you find one please report it in the Official forum thread.
Also games that are "Deluxe Edition", "GOTY" or in general a bundle of game+dlcs in a single app (not in a steam package) are usually a false positives.