With adblockers being a somewhat staple-point in browsing experience, I don't think it's a terrible thing to have ads from individual users or from the site itself. Most adblockers allow right-click > block element and then you never have to see them again. That being said, I've never understood the purpose of this type of advertising. That being said, does Runemate staff have the time resources required to 'check' into each one of these requests and the desire to remove said signatures if/when the advertiser doesn't follow through with payments, their website/service is not what it claims to be, etc.
I suppose it still boils down to your own risk when dealing with other communities. When I did a Community Management position for WoWPlus, we had gold sellers contacting us quite a bit, and most of them were illegitimate so we turned a lot of them away from advertising with us. Eventually moved to the position of no advertising at all because we could not control them obviously and only had ads that were approved by staff from larger, more reputable sites that we advertised to our member base. No members were allowed to advertise directly besides specific sections of the forum we designated for such purposes, and the script authors for various hacks could have their own advertisement if they themselves provided a service, but not to advertise for a third-party.
I voted yes because this is a different situation. We're all more or less using people's work for free and money is a good incentive for people to continue development, come up with new bots, etc. Why not give a little kickback to the people that are creating content? Idk that's just my two-cents.