Might depend on your choice of adblocker. Looking fine to me using ublock origin on desktop and Adguard content blockers + Mullvad's DNS blockers on iOS
If this is true then I am going to question the integrity of the site after being raided or whatever in Argentina. No reason they should ask people to help host something that they are also running ads on, and the type of ads have to be bottom of the barrel.
This may not be the "official" Zlib site run by the same people. It seems like a bunch of clones have popped up, with different groups of people trying to profit off of the confusion around Zlib at the moment.
Looks like it. I also see more ads compared to before.
I have never observed ads, and still do not observe any ads on Z Library—it looks like the same old Z.