[pjmlp]

I rather have money on my pocket than angry customers.

[kybernetikos]

What you seem to be missing is that having to develop for old browsers also costs money.

At some point, it's no longer worth the business of the small number of e.g. IE6 users to put the extra effort in creating a site that can work in it.

[pjmlp]

You are missing the amount of zeros before the comma (or decimal point).