You are bringing a senior consideration to the table; they can and do change their pricing at any time for any reason. Also, every single day you rely on them is a day that your architecture grows on that volatile cornerstone. Would look at https://parseplatform.org/ or https://postgrest.org/ as alternatives; turnkey, hosted solutions are available for each.
We used https://parseplatform.org/ hosted at back4app.com, so we had all the turnkey benefits up-front and the ability migrate as we required more control; there is no need to lock-in at the start. But if you are already 'stuck', I'd focus on using it only in the MVP context for throw-away experimentation.