I think it would be perfectly valid to write something along these lines:
"Hi! I just found out about ArtistShare.com. Looks like a great site! Unfortunately, the way I heard about it was that I learned of the patent suit by its founder, or a licensee, against Kickstarter.com. In protest, I will not be participating on ArtistShare. Just thought I would let you know. Have a great day!!!"
"Hi! I just found out about ArtistShare.com. Looks like a great site! Unfortunately, the way I heard about it was that I learned of the patent suit by its founder, or a licensee, against Kickstarter.com. In protest, I will not be participating on ArtistShare. Just thought I would let you know. Have a great day!!!"