I SM'd after applying and told the what happened. I just got a response from them.
The $20 referral code ended on 4/25. It is now $10. They were nice enough to credit me, but I think it should be changed in the MS post.
There are probably 20 main site posts on uber that I'd have to update. When a deal dies shortly after its posted (its still on the home page), it's updated.
Otherwise it would require 10 employees to keep track of every post and keep 40,000 archived posts updated for every change.
Either way on the enroll page it said you would get $10.