I was kind of dissapointed when I read the new pipe team was having an issue with sponsor block, but tbh their reasoning makes a lot of sense:
https://newpipe.net/blog/pinned/newpipe-and-online-advertising/
And even thought I am using the sponsor block fork now I only skip the non-music part in music videos, because I do agree that creators have to make money somehow. And while I don't love ads most of the time (sometimes they are really well made) my main issue with ads on Youtube/the wider Internet is how intrusive they are and them not respecting my privacy.
Nah, TCP is still just kicking the box over, but just kicking it over again, if the reciever doesn't kick back a box saying they got it.