I just came across one with a new ANN here on the forum that withholds deposited funds if they flag it to contravene AML requirements. I would not be surprised if this exchange does same and withholds funds from users who refuse to KYC or if the KYC does not meet their standards. I'll of course still wait for their reply to the question, if it comes.
As Darker45 in a previous post says, it is some mass production of small exchanges. It is obvious that someone made a cheap script, and connected it with an API to a more serious service, and now we have an influx of such services. Even if they would like to improve the AML part, they cannot do anything because everything depends on their provider. They
Swapper WS are only resellers.