Um, since when do I relinquish my rights whether or not my property is being sold? By giving away my property he is interfering with my business and by accepting money for better access WinCustomize is profiting on the distribution of my property.
Also, this is from YOUR OWN Upload Guidelines:
Ripping/Art Theft
Also to be referred to as copyright theft. No uploads containing in part or in totality another artist's work will be accepted without a written authorization from the original author. Permissions for use must be included in a .zip file with your upload. Repeated offenses can result in removal of uploading privelages.
Copyrights/Trademarks
Images taken from other sources cannot be accepted without permission, including but not limited to pictures taken from movies, television shows, games, web sites, magazines, celebrity pictures. However, although they are theoretically also copyrighted, we will be lenient concerning corporate logos and OS ports, unless we are approached by the companies and asked to remove them. An exception: sports logos. Sport organization make money selling the right to use their logos and explicitly forbid the distribution of art containing their logo unless a license is purchased.
According your your guidelines the submitter needs to provide you with WRITTEN PERMISSION to use my property. I assure you, if he did, it's a forgery.
And if I actually have to get a lawyer involved in this, I not going to settle for just removal of my property. I going after monetary damages. This is my livelihood we're talking here and I take it VERY seriously.