I signed up with them 3 days ago and to my great regret I didn't read the reviews before doing so. EXOCLICK is completely unfriendly to new advertisers... I deposited about $200, launched the campaign and waited for it to be approved. Instead of getting the campaign approved, I got an email saying they blocked my account without explanation.
Exoclick are scammers!
I wouldn't advise anyone to contact them!