Edit: it's a subscription. No, thanks. I much prefer the crowdsourcing model, which allows the entire world to have it (and contribute to it), and not only those who can pay such prices (that are quite expensive in most of the world, including where I live).
The problem I would think is the overlap for this of users who want jank removed from web pages and those who would choose to pay for it if optional is small.
It may be small in proportion, but large enough so that a Kickstarter could raise enough money to create and free the code as opensource.
Another subscription service and software you can't actually buy is much worse than the annoyance of pop overs. Does it atleast keep working without updates after a year?