When I opened my Revolut account I took advantage of their referral scheme. I would get €15 for every customer I referred to them and who used their debit card. The new customers would also get €15. I got five people to sign up, the max.
We never saw the money. When I raised the issue over chat they told me that all my referrals took too long to setup their account and make the first payments. They wouldn't tell me what the time limits was though. Every referral made their first payment within 30 days, so that doesn't seem too long for such an offer if you ask me.
At this point I was using it as my primary account so it wasn't like I was just signing up to get referral bonuses.
This experience made me think they weren't as trustworthy as they claimed to be.