[rartichoke]

It's not as simple as you think it is.

A lot of them already use shared hosting from previous sites and want to stay with them because it happens to work in their case.

So now you're stuck using some old version of PHP and mysql. What if you haven't bothered spending a ton of time with PHP lately and for the last few years you've been working with node and rails on projects you deem "worthy"?

Should I spend dozens of hours researching best practices for an obsolete version of PHP and make sure I do it right? Or should I lecture someone on reasons why they should allow me to host their site somewhere else and then setup a VPS for them? No frikken way.

Also when you need money, you accept work. That is how the world works. For some people/situations it's not worth throwing away $400 on some job because of annoying clients. You deal with it and put the money in your bank.