Just recently I saw an ICO that asking a monthly income and bank account statement for a KYC. It's said on their KYC form that it is important for them to know the financial capacity of their token holders or buyers.
What can you say about this requirements?
Somebody here did it before?
I think there is nothing unusual in the information requested. This is a standard situation aimed at combating money laundering. If you are interested in working with that particular service then give the data required.
But you can avoid this ICO.