Lol, you don't need to assume that Stellar is a scam without any proof. As far as I know the giveaway they make will always work well and always pay, although indeed because with the large number of participants we have to wait in line, at least we have to be more patient until our account is credited. Even my account has been credited 2x so far from the keybase program, and even I received 688XLM. I have long followed the development of Stellar so there is no doubt about them.