Same thing happened to me recently. I got the following message below:
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Hello,
I am contacting you from the Exoclick Compliance team regarding your publisher account activity.
Please, be kindly informed that on review of your site(s) performance we have decided to reject your sites as they are not meeting the expectations of our advertisers. Since some advertisers need to be compensated, no pending earnings will be paid.
Your account is now closed and unfortunately we will not be able to work with you in the future. Any further new accounts that you register will be also closed.
Please note that we do not enter into discussions about the checks we carry out, or what prevented you from working with us.
Even if we cannot work together, we appreciate your interest in our platform and wish you the best of luck in your future business plans.
Kind regards,
Peter
Compliance Officer
Compliance Team
ExoClick Customer Services
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This was followed by a “stand with Ukraine” political advertisement. I received no warning. My website is new, only been up a few months, and I did not have many visitor at all yet. I did not expect any payout from Exoclick for a year or two but I would think they would at least warn me that my site was underperforming or whatever other reason they used to ban me.