My own personal blog (not very critical) has a Class 2 certificate, and I decided to switch to a Comodo PositiveSSL ($5/year for 5 years) and not revoke the StartSSL one.
My own personal blog (not very critical) has a Class 2 certificate, and I decided to switch to a Comodo PositiveSSL ($5/year for 5 years) and not revoke the StartSSL one.
To answer your question, suppose I think my key has been compromised. Then I don’t want to continue using that key because non-MITM’ed communication between my server and the client is compromised. So I generate a new key, and I’d like a a new certificate for that new key—the old one won’t work (Apple Secure Transport bug notwithstanding). My users are still vulnerable to a MITM attack, yes.
--edit: assuming that the user’s connection uses a non-PFS cipher suite.
EDIT:
Are resellers like them more trustworthy? I understand that big CA often sells out to smaller CA and smaller CA sell out to even smaller CA. But how trustworthy are ssls.com and namecheap?
EDIT
Okay. I see. namecheap has been running since 2001 which means it has been doing business pretty well :) So why are they cheaper? Because namecheap are the one managing all the accounts and Comondo is only doing validation?
I mean, damn people who use a free thing that then get screwed, through no fault of their own, not wanting to be charged $25 for a part of the service that they would never need to use otherwise.
You're either free, or you're not -- StartSSL is a mish-mash of "free" and opportunistic costs.