Not sure if Coinbase did pay you for your KYC, but other exchanges (especially those new ones) pay you some tokens if you registered and complete KYC verification. The higher tier you belongs to, they give you better rewards. But of course, I'd rather not do KYC just for the sake of some tokens which can be worthless pretty soon.

IIRC Blockchain and XLM also do requires KYC to participate in their XLM airdrop, but believe it or not I know some people who have more than 5 IDs (either steal it or copy it from their friends) got their airdrop without failure.