In some ways I could see some use as a "cesspit" VM and a glorified web browser.
I.e I am a very happy OpenBSD user, however when it comes to viable web browsers, there isn't that many. Firefox is becoming creepy these days, Chromium is dangerous and things like Iridium or Waterfox are "non-standard".
Often I just VNC into a Windows VM, use whatever crap pops up first, be it Firefox, IE or Edge and use that. When I am done, I simply reset the VM.
Now, I would never use a cloud service because it sets a dangerous precedent (they might start thinking they can outlaw full fat PCs), however I could kinda understand why someone would use this instead of installing a web browser locally.