SEDO blocked domains after sending some paid traffic

SEDO seems to work well for some arbitrage traders even if they send traffic directly from native ads. It is in their ToS that we shouldn't send any paid traffic. But some people are sending.

I tried to send some native traffic directly to parked domains and SEDO blocked them. Of course, there is a better way of doing it, such as adding a website or a search page in the middle.

But I was wondering how some people were able to do it.