Version 1 of a product is the point where something changes from "pre release", Beta, Developer edition, Alpha etc to Live.
I imagine that a lot of people here are familiar with using Betas - or even create them.
Like you, I have been using Privacy Badger for a while now but now, it is no longer experimental - hopefully anyway.
It should continue to update with time. Good luck to them.
Advertisments, in my mind, tend to be for things that will make the producers money. The EFF is not asking for money for this. You do not have to look at adverts. Do they count downloads? Probably. Do they track users? It would make an interesting story if they did but I think they probably don't.
Slashdit talks about new stuff. We might talk about new versions of Linux. That's not surprising. Someone might want to talk about the new #iShinyShiny thing from Apple as compared to his (more often than not) Android smartphone. People here like to slag off Apple. The EFF gets a more civilised ride.