Oh, I understand that, and I understand the terms of service. But there was clearly no warning for users before the migration.
I've been in the field for about twenty years, and as a rule, before a Migration, PC Refresh or major infrastructure change you warn the users, so they can perform a backup... Those users who would normally backup quarterly, or monthly would do an extra
snap-shop before the migration to mitigate issues. If they never backed up information the majority would that one time.
Heck, I'm currently supporting an environment with 18,000+ customers and deal with this exact issue (or similar) weekly.
This was not done, users were not warned, and "if" there was an email or a notification done it was either poorly designed as to not be attention
getting, or designed to fly under the radar. Again deal with notifications of this nature frequently in the environment I work in and know what to look for.
Personally I've called, emailed and IM'ed and every time I've reached out through the "Help", "Feedback" or "Customer service" portals I've been stonewalled, blown off, or flat out lied to. I tried to resolve problems, or report bugs / found flaws and been
feed over a dozen different lines, including "The migration will stabilize in 10 business days, all performance issues regarding your account should be resolved then", or some other token response.