Used Huobi a couple of times (yes, I'm actually one of those who's tried a lot of exchanges) mainly because I wanted to experience all these China-based operations. And yes, also because they gave away a bit of crypto just for a signup (Tron, I believe). Signed up when they were still Huobi Pro and still all in Chinese!
I only did one deposit (BTC) to get myself a small amount of something else (hint, China). I also just logged in now to confirm what I remember, there is no KYC at all, not even phone. You do need an email though.
The limits are updated here:
https://huobiglobal.zendesk.com/hc/en-us/articles/360000074411-Withdrawal-LimitsAs magneto mentions though, if there IS an option for KYC, then be prepared to be asked at anytime. Me? I generally complete full kyc if I plan on using the exchange properly.