When you send a lot of ETH or USDT to a big exchange like Kraken, do they care if its come from a smaller non kyc exchange like Blofin? Do they care if it came from a bridge?
Yes, exchanges do care about the source of your funds, and if you are flagged as a high risk customer they could block your account and ask you to tell them the source of those funds and to prove its origins, and if you cannot do it then you are never going to recover your coins, so be very careful when dealing with exchanges, as sometimes even if you have done nothing wrong, you could be forced to go through this process and it can take you quite a while to get your coins back.