Once the trial expires, you won’t be able to access your account, but as part of the trial you can now export and back up data as you wish.
Of course! Providing your account is under the 1,000 limit in a rolling 12 month period then you won’t need to the Power User Subscription. You can check your account size too - check out this guide.
But we certainly won’t hold your data at ransom - if you need help, then we’re more than happy to see what we can do 