They do have Black Friday sales that make it a bit cheaper.

For a better user experience, try Weyd + Premiumize.

Premiumize is good, and supports Usenet too (which is very useful for rare/unpopular content)

Depends on how much you download. You can pay a once-off payment for a block of data and it lasts indefinitely. I’ve got a 5TB block I’ve had for over 10 years. I think it was maybe $25 when I got it?

Edit: If you need more data, there’s plans with unlimited data for a few dollars per month.