PrincessMassacre;n8399180 said:
Often, game mechanics/grind in subsequent levels are increased as 'incentive' to get you to part with more money
I'll start assuming you have never played the game yourself, so I'll explain things in detail to you since all your pretty rethoric is telling us you don't know nothing about it.
First of all, you start with a basic deck for every faction in the game, so you don't start with 0 cards. As of now, you're also granted a premium golden legendary card as a gift. Premiums are the same as the regular cards, but the art is animated. No better effects, just prettier and way more expensive to craft with scraps. If you want to craft all premium cards, your investment must be greatly higher (I assume that 500$ calculation for a full collection includes premiums). But, as I said, it would be just for aesthetics. You gain nothing for it.
You gain rewards in-game in 3 different ways: leveling up, ranking up and daily rewards (divided into 3 tiers).
Leveling up is indeed exponential. The higher your level, more time you'll take to achieve the next. But level-up rewards are usually crappy. Apart from some very key levels where the reward is really, really good, you just get a random crappy rare card or a few scraps or golds. Levelling up is far from being your main income mechanic in-game.
Ranking up is what you get for progressing in the game ladder. Rank-up rewards are actually great. As you go higher, you might get rewards worth 3 to 5 kegs. There are currently 15 ranks in the game. The higher you go, the better the reward gets.
But the main income, and what really makes Gwent a much more generous game than most of the games of the genre, are daily rewards. They work in 3 different tiers.
The first tier takes 6 won rounds to complete (3 wins) and rewards you 100 ore (1 keg). Every 2 rounds you win, meanwhile, you get a "mini-reward", usually 15 scraps or 15 ore (not sure if it's 15, can't remember exactly, but something like that) or, in some cases, a common card.
The second tier takes 12 won rounds (6 wins) and reward you with 75 ore. You also get a mini-reward every 2 rounds.
The third tier takes 24 wins to complete (12 wins) and rewards you 50 ore. You get the mini-reward every 4 rounds then. If you complete the third tier, you get the third tier to complete again if you want.
With this system, if you complete tiers 1 and 2, you pretty much get 2,5 kegs per day (counting the mini-rewards and GG rewards from those games). That's 5 kegs every 2 days with something around 15 games a day (assuming you're a newcomer).
Another thing, you seem to believe that, in order to have "all the decks", you need to have all the cards. You could have 2 meta decks for every faction with roughly 50% of the full collection (if you even need all that much). All you have to do is to craft the cards you need, instead of crafting them in alphabetical order.