I used to work at a largely ad-supported community site. Users requested an ad-free paid membership, but when we ran the numbers, we found that those people wi

I used to work at a largely ad-supported community site. Users requested an ad-free paid membership, but when we ran the numbers, we found that those people willing to pay made the site much more in advertising than a reasonable subscription could. However a while after I left they launched the service, so maybe they’ve managed to make it worthwhile.