No problem. Had to put on my investigation hat and go digging. :P :)

snip

sorry, small mistake from my part, carry on.

Seriously? Have you actually tried it or are you just spouting bullshit?

It's a CCG, of course they are going to sell card packs, that's basically how they work. The post BKGaming linked explains it pretty well, it needs to be free so that there are enough players to make it interesting. Buying cards is entirely optional and really not worth it from what I've seen, I'm already at the point where kegs hardly ever give me new cards, so actually paying for them with real money would be stupid.
It's a really balanced game and with a bit of skill you don't need any particularly brilliant cards to win games.

pokemon tcg online for example don't sell cards or packs in-game.
Also there are some old single player (with local multi-player) card games that you can buy one time with no stupid pay2win.
for me every game that use microtransactions is shit

That's a very narrow minded view. Sure, most games with microtransactions usually are shit, but that doesn't mean any game that includes them immediately becomes shit.
Buying the kegs in Gwent becomes pretty pointless quite quickly. These days if I get a keg I'm lucky to get one card I don't have the maximum of, so the rest go for scrap which usually amounts to 20 scrap. I can get that from winning one game or losing two.
If I spent £60 on cards it wouldn't increase my chances of winning games at all.
Also, I don't think your Pokémon example is entirely accurate, they may not sell boosters in game but as I understand it you get codes with packs of the real cards to redeem in game, which pretty much amounts to the same thing.

it is not the same because when you sell object in-game you turn a game into a gamble.
still I don't think pokemon tcg online is a great game that should be sold on gog...