unless you are from the following countries
[1] you can apply for KYC.
Gate.io start requiring KYC for Deposit on Feb/2021 --->
https://bitcointalk.org/index.php?topic=5315063.0Are they scammers? There are not enough claims to confirm this.
Will they ask for KYC verification? Yes, at some point, KYC verification will be requested, so even if you use the site for several times and KYC not requested, it will be requested sooner or later.
what should I do? Try to avoid them if you don't want to complete KYC.
What if the currency I want to buy/sell is only listed only on gate.io? Avoid it.
!Citizens and residents of Washington State(U.S.A), New York State(U.S.A), Cuba, Iran, North Korea, Sudan, Syria,Pakistan, the Government of Venezuela, and Crimea are not supported. centralized and decentralized methods.