Does anyone know anything about FirstCovers.com? I recognize some stock images on the site. However, their TOS says:

"If you contribute layouts, scripts, graphics, tutorials, creative suggestions, ideas, notes, drawings, images, or other information (collectively, the "Submissions"), the Submissions shall be deemed, and shall remain, the property of FirstCovers.com. None of the Submissions shall be subject to any obligation of confidence on the part of FirstCovers.com, and FirstCovers.com shall not be liable for any use or disclosure of any Submissions. Without limitation of the foregoing, FirstCovers.com shall exclusively own all now known or hereafter existing rights to the Submissions of every kind and nature throughout the universe and shall be entitled to unrestricted use of the Submissions for any purpose whatsoever, commercial or otherwise, without compensation to the provider of the Submissions."

It doesn't look like anyone is getting paid other than firstcovers.com by the advertisers.

They are a US entity. See the "Pond 5: What should we improve?" thread.

Clarification on whether or not your main office is in the U.S. so that both U.S. and non-U.S. contributors  know how to handle taxes. Are you based out of the U.S.?