I hope not, I've been depending on this service for a while. I have it integrated via FUSE on my prod servers.
We did have some problems of blocking on large files, which is less than ideal for a /dev/null service.
After dealing with their customer support (which has been super helpful), we are looking to move to a named pipe / FIFO.. Which will non-block and cache lolcally, with a watcher service to push it to their site.