The webshop and the keys, in particular, were created as a way to bring fresh money into the game instead of recycling the existing ped that already belong to MA anyway. It's MA's bread and butter, just look at the revenue explosion on the financial reports since the webshop launch. Sure, many people withdraw the ped and deposit them again through the keys but they pay the withdrawal fees and then lose some while cycling all that universal ammo, so it's still perfect.
But people demanded a way to get keys in game and MA promised it, and here's their way out. But if they hurt their webshop revenues but making this bps common, they'll risk going out literally.
Not to mention the crash of the rings' value and the following loss of trust. How invest in something if it can get devalued overnight? What's next, crafted land area deeds?