> Rather than asking people, if you can, try just changing the prices and see how customer acquisition changes.
This is essentially the best advice you can get.
IF you have to be safe because you're e.g. in Germany and you can't just change other peoples contracts after they signed up. Just keep the old contract/subscription types and then offer them a migration path sometime in the future.
> IF you have to be safe because you're e.g. in Germany and you can't just change other peoples contracts after they signed up.
Isn't it the very nature of contracts that you cannot change them unilaterally? I'd be very surprised if there are places where you can legally do that, and I wouldn't call such a thing "contract".
This is essentially the best advice you can get.
IF you have to be safe because you're e.g. in Germany and you can't just change other peoples contracts after they signed up. Just keep the old contract/subscription types and then offer them a migration path sometime in the future.