Thanks. Didn't know that. Just assumed that most tech companies' TOS includes a line reserving the right to terminate service at their sole discretion.
Terms of Service aren't necessarily legally binding - it's up to the judges to decide how much validity to give to them. Here, given they're offering refunds (and it's likely an American court that would theoretically handle this anyway), it's unlikely to have any serious consequences to the company (in legal terms).