Hi fatal,

all taken care of, we were aware of it and those sites were (and are still being) taken of our database plus their accounts banned etc.
More importantly - 0.13 BTC invested in ads on these sites by advertisers were credited back to their accounts so advertisers did not lose any of their funds.
We have implemented tracking for invalid clicks/impressions so anyone trying to use bots, fake traffic etc will be found and all funds will be always returned to advertisers in full as it is stated in our TOS.