I use Postimage for all my photos on the forum (which is admittedly not very many). I first learned about it on here, I think through the "how to post an image (link heavy)" thread. It would not at all surprise me if the site someday went under or if links were reduplicated, but I don't value my silly little hair photos highly enough to care. For photos that are important to me, I am very careful to back them up to an external hard drive and, if I do need to share them online, to use some of my limited Google Drive space to do so.