From the blog:
just too much of a hassle. The application process can be
confusing. It usually costs money. It’s tricky to install
correctly. It’s a pain to update.
If the reason there is not enough SSL around is because it's too much hassle for webmasters, I doubt there is a solution. If you want to take payments you get SSL. if that's too much hassle PCI compliance is going to really stretch you.