Google prohibits you from using your cloud storage for sharing photos on third party sites, what does that say? It's not the storage, it's the bandwidth. User generated content can also be a liability, that's certainly something that PRS isn't going to want to hire a full time team to ensure. They don't even have the resources to update this software. I know it's not ideal, and even a high barrier for entry for some, but that's what was agreed when they kindly agreed to host this for the community. This site us for us, not for PRS, and yet they are footing the bill. That's more than generous in my book.