Indeed it's very simple.
When someone creates multiple accounts on a platform it raises alarm bells. While there may be legitimate reasons (compartmentalization of assets), when there are monetary transactions being set up involving fresh domains and dodgy whois (and new user accounts) it's clear an abnormal pattern is taking shape.
You are probably not familiar with risk & fraud control procedures.
At this point it is very understandable they have doubts on your motives and your identity.
Maybe if you had been more upfront with them (and with us) they would look at you differently.
Instead you chose to slander a legitimate business without providing the full facts.
Can you prove that you are to not trying to cash out money from a hijacked paypal account for example ?
Sorry but it does not look good. When I see stuff like this taking place on our platforms I definitely want to know who we are dealing with. Strangely, some 'UX testers' prefer to vanish rather than verify their identity