Hello.

That is basically paying to vandalize public spaces and people's businesses (restaurants, cafes?) with stickers.
Despite that, no one usually pays attention to such things except being annoyed by them. And if someone does pay attention, they will probably think that it is a scam.

"Scan Me to Get $10 in Crypto in 30 Seconds" ?
Who will give them $10 in crypto? Paid from DHF in Hive?

Someone can just scam it by scanning stickers pretending to be different people and then farm that $10 while also getting free accounts with it, which I suppose will be also created with no phone and email verification ("1 click signup").