As much as I'd want to +1 this, Isn't that what the donator status is for?
If you could get it through AP, then there wouldn't be much of an incentive to donate.
I'm going to add on to my previous reply.
I do understand that this lowers the incentive to donate, but what if the amount of AP point require to unlock this feature will be significantly high (let's say 6000 points or more). This way,
only the most active players get this perk. The more frequently players play the more the money skial makes in advertisement revenue from the particular player, so even though they do not donate they are still paying the server. To point out, to get to the range of 6k points, you have to play on skial nearly every day for 2 1/2 months (taken from my personal experience). This will
not get rid of the incentive to donate for the majority of players as many of them don't have enough time to play every day, hence they will never reach the required amount of AP points to reach the perk. For that particular group of people (which is quite large) their only way to get the perk would be to donate.