Uber referral code recruitment bonus shills having more difficult time recruiting newbies with exaggerated claims of income. Article doesn't mention that probably 50% of new recruits never get sign-on bonuses because of onerous hidden terms not stated - newbies easy to deceive.
https://www.pastemagazine.com/articles/2017/03/can-you-still-make-money-recruiting-for-uber.html
https://www.pastemagazine.com/articles/2017/03/can-you-still-make-money-recruiting-for-uber.html