The bot accounts absorb a lot of the cards in various ways, but the recent changes means that they have more limited potential, meaning they have to hold cards differently than before. The effects will take some time to see I think, but for example, the end of last season was a bit different in the rental markets than the one before.
I think the numbers of cards were chosen based on new player expectations going forward and this exact crushing of prices. The entry to play is the lowest it has been in quite a while, but that comes at the cost of people who already own cards. My investments in mean I am actually at a loss at the moment on the assets I hold, but I figure as demand increases on the game in the coming year with LAND taking a lot of the cards off the market too, things shift again.
This is crypto, get used to the feeling of disappointment :)