What is your opinion about opskins, and the "new changes" ?

I don't play CS. I don't have 10 hours a day to devote to "getting good"

It's fun!

Please. The underground CS:GO skin gambling and trading is where a large (or most) of Valve's infinite free money (and a detectable percentage of the Russian GDP =D) comes from. Sometimes when the pressure gets large enough or they realise they might lose money they do a publicity stunt like this, but that is about it.
If I was one of the owners of such a site, I'd be more worried about the same thing as Valve: PUBG item trading seems to have overtaken CS:GO in daily volume, only if it ever moves outside of Steam, they might not be able to exploit it that heavily; the Chinese more than likely would hold a monopoly over that.

Nope. Valve may go after all the other items trading sites.