The "Simple" app collection the FOSS community loves did the same thing with their play store version calendar, which is why I dislike them. Their FDroid versions may not do this, but like... comes off the wrong way.
You can even just get a raspberry pi, install openmedia vault. Get a 2tb external hard drive, and just do it that way without worrying about this type of shit. It isn't hard to setup either.
They give you a free 7 day trial. I know this because I wanted to check if I had any photos there (I had none, and already requested the account deletion).
7 days is really stingy, though! Especially for a service that hasn't really improved since I signed up for permanently free account last decade or the one before that..
I've had apps do this. One was the old white pages app that changed their name to something... I think it was Hiya? They had the app free for years and users would add in call data (names to numbers). Essentially it was a community data pool.
One day, they shut the gate and the only way the app would function is via a subscription every month. Eat my ass. I'm not doing that and you're a dick.
It's totally extortion. I signed into my multiple accounts to download everything within this past six months, and they WILL NOT STOP begging for my money and to come back. Nope. I just wanted all my blinkies from the early 00s tyvm.
I should probably just go and request for those accounts to be deleted...