And valve already stated, the things in the shop will be purely costmetical and optional, THEY DO NOT AFFECT GAMEPLAY, SO YOU DON'T NEED THEM.
The lgendary invite exists because they don't have the servers to open the game up fully yet.
And it's your opinion that the couriers are too expensive, and that they should be 5-10 €.
What if having them as 5-10€ would make it non-profit? Do you know what was used to make them? What the people behind it was paid? No, you don't.
Also you can't use more than one courier at a time anyway, and one courier is around 10€, so no problem there. Why do you care about a bundle of couriers? You can only use one at a time anyway, and you even have a chance of finding the couriers ingame. And you paid nothing for the game.