You can request we delete your data and maybe we will lie and say we did when we didn't actually and maybe we will just tell you to fuck off in nice corporate language but either way you can rest safely knowing we won't delete your data and will probably let it be stolen by black market hackers
It helps that the cost per user isn't that high you for small and medium sized the instance owner can generally just pay out of pocket and the larger instances can just ask for a dollar a user and have more than enough money to pay for there instance
Try unsubscribing and then resubscribe if they aren't showing up in your subscriptions