Spectrocoin is a custodial platform, so it's more of an exchange than an actual personal wallet. And yes, sadly this type of request is very often done by centralized services and exchanges.
The problem is that there's is no way to confirm whether Spectrocoin is indeed interested in knowing the origin of the funds, or they're just selectively scamming their users. But like you said, the amount is very low so I suspect that they found something suspicious about the transaction, which is not surprising, YoBit never had a good reputation.
I cannot make sense of the banned IP address though, unless you were using a VPN? Withholding the money or restricting the account should be more than enough even if they suspected that a hacker is trying to access your account.
Yes, they have various services, cards, bank transfers, exchange etc, and with all of this they are attractive enough, as I said, I have been used them many years.
"sadly this type of request is very often done by centralized services and exchanges." - ok, will know now.
I heard about Yobit's reputation and just played there in my spare time, never deposited and never invested, so thought just to try to withdraw these few dollars.
I didn't use a VPN, it's a stable IP. But if I was able to login on my phone it means they did not block my account, just IP.
Thank you.