i noticed that one too but i read "First 100 people who repost this will get total of 10,000 No-KYC sats." this means he could pay only 5 people each 2000 sats "a total" means you would have to check all 100 renotes if they got zapped 10k sats in total!
It's ambiguously worded. Have a look at the repost zap tally (shows on the original post) and comments section. People expected 10k and got nothing for boosting. Also look at all the "sat giveaway" bs they spam. It's basically their whole platform. Look for yourself. I think you'll find an account that's not worth believing or boosting.