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

My father is a special person...he have one legs ...of I win 1 ETh I will buy one new Legs for my father....

Here to serve community...
Love farcaster chanel /louder /carrots /replyke & /kollector

If u are right then @shanemac.eth will help your father