I think drdaeman meant _certificates_ and not _servers_. One certificate can be used on multiple servers, but you can't create multiple certificates “for free“ on Comodo,Gandi or GlobalSSL. You're charged for every cert.
I'm using StartSSL verified, it costed me 99$ (personal verification) plus 99$ (company certification), and I can create any certificate I want, at any time, valid for two years and wildcard included.
Since my company provides custom subdomains for clients, and every client can have multiple subdomains on his own subdomain, we can't afford the price for every client. (I know we should charge them, but this issue is out of my hand).
The 25$ revocation fee sucks, yeah.. but StartSSL has his advantages too.
