Kristen,
I wasn't even aware of it until some of you started posting that you couldn't load any more pictures. Why it was done only Brent or Computerworks could give you an actual answer, but my guess would be to save space on the servers. The other sites that I belong to have a limit, even the one that charges yearly dues. But since I don't post a lot of pictures, I never have a problem with it. And I have been using an off site one for years as I can let anyone in to see what I do post or I can selectively control who can and who can't access them.
Ron