With data going forward? or past data? Because I don't agree with using my past data... (kinda of rhetorical as I long deleted my accounts, though I'm sure the data is still there)
Technically, not deleting your data would be a GDPR violation of the right to be forgotten. They could be ignoring that but it would be very expensive if they were found out. Probably doesn't apply to models that have already been trained, but should apply effectively going forward.
