If paid service unrestorably deletes data without first getting in touch with client, it is worthless, as you should have moved away first time it happened.
So far both cases were for events promoting a specific product. They were in the grey area for sure (this one less so) but they were both in the same grey area.
So yes, now I will definitely not use them for anything related to me trying to sell something, but I wouldn't have anyway, and continue using them for actual meetups based on common interests.
I am not questioning whether OP did something wrong; If he did, as a paying customer (and first offender), I would anticipate some kind of notification email, or something at least.
Sure, for repeat offenders: repeat notifications, then close account, refund adequate part of payment and that's it. You should never irreversibly delete someone's data. Moreover when he's paying you.
So yes, now I will definitely not use them for anything related to me trying to sell something, but I wouldn't have anyway, and continue using them for actual meetups based on common interests.