Your ISP will still have a log of which IP was assigned to you at any date and time

Most of the good ones are either invite only or pay for, and even then you’ll only get access to some of the keys needed.

None of the free ones provide keys as far as I’ve been able to find.

It seems rather messy and convoluted compared to how usenet used to be.

What indexer?

How do you find good things on Usenet now? So much of it is uploaded encrypted