[Retric]

I suspect getting ~10k from ~2 thousand accounts spread across several advertising networks probably is much easier to hide.

Alternatively splitting an extra 200k/month with a few large websites under the table probably works very well as there is less to distinguish bots from the overall noise. Another apraoch is probably setting up the equivalent of advertising re-sellers where you spend X$ advertising and get slightly more than X$ in revenue and then boost those results with click fraud.