Yeah It doesn't longer goes to spammers but to professionals lol, #notsofunny haha.
You can check the transactions here: https://explorer.byteball.org/# addresshere
The referral link is just a fallback when the bot can't find any already attested user to give the referral reward.
Haha so fishy, but still so awesome... :D
However, it's sad though.. That they couldn't come up with a better system for the refs. At least the spammers doesn't earn...