An anonymous user writes:
" It's time to switch from mass-email to a web page with RSS. If people really want your newsletter, they'll come to you."
That would be fine in many cases, but it does not work for the purpose in question here.
For example, consider a user in some country where many web sites are censored, blocked by government filters. He or she can use a proxy, but the gov't routinely blocks proxy sites too. Even VPN hosts may be blocked.
Benhett's group's role is to continuously create new proxies, let people know about them, and hope they can get some mileage from them before they are blocked.
The notifications cannot be done via the web, for two reasons. One is that the web site involved would of course be blocked, so it would do users little good. The other is that it would give censors a list of proxy sites to block.