Patrick (@iFroggy) posted a great article about paid memberships (http://www.managingcommunities.com/2012/07/16/banning-premium-members/) over on his blog earlier which echos my sediments on the subject to the tee. I've been thinking about implementing an upsell for members more a less so they can support the site. Several members have expressed interest in donating despite the site being the site being supported by advertisers. I haven't done the math in quite a while but I'm pretty sure on a year to year basis our hosting and licensing costs are still covered by advertising dollars. Most upsells include increases in artificial limits being bumped up. Most sites give an increase in PM space, larger avatars, more signature space, etc. in exchange for a premium membership. My trouble is that I already give all this to my members. Promoted users (those with more than 30 days and 10 posts) get something like 5k PM storage, as large an avatar as I feel comfortable offering to everyone, and virtually unlimited signature space (within reason, of course). So, what do I offer as an upsell? Do I artificially limit 'normal' accounts to encourage an upsell?