He's giving away stuff for free or nearly free, he's probably not a scammer but maybe a troll giving away stolen gift cards and codes for free and he wouldn't be the first person on the internet to do that.
Ok, so that covers the "stolen gift card" aspect. Now how do you explain him paying other people's debt, handing out btc to people in hardships, or kickstarting a fund with btc that otherwise wouldn't have happened? None of these that I mentioned involved any gift cards that could be potentially stolen like you mentioned. First time I saw him paying someone's debt out of the blue, my jaw just dropped, as I was pretty confused. But then I saw this several more times and figured he was more than generous to help someone out. Are you going to say these are stolen btc too?
Perhaps the people that donate to charity in real life, maybe all these funds are illicit too, right?