Adding a bit to what zea3 said, the site depends solely on the voluntary good will of TFP lifetime memberships for it's funding.
Advertising, however tempting, automatically taints the site as a user supported forum. I see no realistic way we can have the frank, open discussions about pool management remain completely uncolored if we accept advertising.
The current level of lifetime memberships does not support the significant expense of software upgrade that would help this site tremendously. Sometime next summer, we will be very close to our maximum capacity for traffic and that issue will stop being a nagging undercurrent and will be a full blown problem.
Right now, we are exploring possibilities to keep the spirit of the site intact and generate the increased revenues that we will soon require.