Use Firefox + uBlock origin for your own sanity. Don’t let big tech make you feel guilty for not going along with their game.
100% this and also, consider allow-listing specific sites which deserve your support, or better yet, contribute directly if you can – e.g. your local bike club forum, your local newspaper, a blogger whose work you enjoy, etc., assuming of course, the ads are reasonable.
A /8 subnet is basically everything after the first of the four segments, e.g. 127.*.*.*. marine_mustang was saying that loopback (what you think of as only 127.0.0.1) is actually an entire subnet, so any address that starts with 127 will hit the loopback interface. TIL, never thought about it much before.