i assume the option is everyone sing up for a $5 per month account or just put up with the ads. Web sites like this just dont run themselves, the e-business model that is being used here is the standard forum supscrition model used across the web, it is great that there are free accounts and thus this creates the need for advertising. Google advertising is one of the most sucessful forms of revenue for many web services such as pprune and why google make $6b per year. it is also one of the best ways to market your company. i would show my brilliance with all the stats under the sun but - i think i would be shot down.
good luck to pprune, everyone here whinges if people fly for free these guys are just trying to make a buck too.
thats my 2 cents anyway