I didn't read every comment in this thread so if this has been mentioned already, I agree with whoever said it.
In regards to "the cost to keep the site up and running": Mountain Project has been up and running since 2000. And it has always been free. No annoying ads posted to the bottom of forum posts, no annoying pop up ads. No need for people to give a percentage of what was paid for their used gear to the site. And if you've spent some time on Mountain Project, there is A LOT more content on there compared to here.
And take this for what it's worth…I would love to see a spreadsheet of the costs it takes to keep the forum going along with how the money received for $25/year and the $110/lifetime memberships are being used, specifically towards forum and site maintenance.

