Yeah, unfortunately that’s the problem with using file hosting services. They can go away at any time. Better to put files in something more established like Google Drive or Dropbox, etc. but I’m sure they will eventually go away too, just hopefully not so soon.
I think China has some kind of strict firewall that blocks Dropbox and google drive. I could be wrong. Just I know that people always don’t like it whenever I host something using either of them.
Then again, there’s always proxies. Plus icons should be small enough that the speed hit doesn’t even matter.
Github seems like a decent place to put stuff too, but there’s more of a learning curve to use it, I guess. It also only really works well for small files. I think there’s a limit of about 25 or 50mb per file? On the plus side, you get versioning/history. (I don’t know how it is in regard to the Chinese firewall.)