Any MUD that's placing banner ads isn't free of economic taint, even if it is free to play, trust me. I'm guessing you saw an Imperian ad. I came from there, tried that as my first MUD before I found FK. Yes, it is free, but money opens doors. The RP is nowhere near as good, even though the clinkety-clinkety allows them to have people running RP's quite often, and the world is huge. My honest opinion: The more people clickety clickety and try those other places, the more they will appreciate FK. (Or, they'll find some place that's a better match for them - no problem there, to my mind...FK is the grandmaster of what it tries to do, but it's not for everyone.)
As for why these ads show up: Google knows all, and figures out what we are into...and sells targeted ad space to the type of people it figures out we are...hence all the dice, miniatures, and RPG ads, includings MUDS, MORPS, MMORPS, and what have you. I'm heartened to see the number of "Become Sir Twink-a-Lot in just 24 hours!" ads decreasing...maybe that means we folk don't click on those!
