Keep it simple and just use the word rent. No need to complicate it.
“Rent until we choose to not allow you to access it for a one time payment of $x”.
“Rent until we choose to not allow you to access it for a one time payment of $x”.
they (the ones that are subscription) still are.
And most of them have micro-transactions on top of that as well. Some will give you a (very) limited number of micro-transaction currency-units per month.
EDIT: sorry, just came from the future.