Is your machine state persistent between connections ?
EDIT: well, I tried to join and the signup ask me for my phone number. I already disliked that, but tried anyway. Every time I tried to setup a machine, the site answered:
"This machine type has not been approved for this account yet. Tell us a bit more about your use case and we will prioritize your request. A member of our support team will approve your request shortly".
Yeah, my request is that I'm a paying customer, I don't want to justify myself for the privilege of paying for their service, thank you very much.
So, no, I don't think I will try paperspace.