Is it illegal to give away money to followers?

What if I said I would give 1 ETH to a randomly chosen follower this Friday? 

Screw it, let's do it. I'm gonna give someone 1 ETH on Friday. 

Only rule: Must Recast this post with what you'd do with the ETH

I’d spend it on @ampsfun, further perpetuating the cycle of giving people money to recast like our forebearers intended

Building /bright-moments - minting onchain art IRL | /purple #15 | FID 129 #magikarp | getting paid to post with @ampsfun

Why would it be illegal?? People say they are giving sol away on X everyday and in 8 years i never meet anyone who said they dropped their addy and got anything. I always thought they were farming engagement and tracking wallets.