This list is great. I think it's funny how many of these folks criticize the list. They are probably the same ones who chose to OS their products for them to go off and die on Git rather than actually sell it.

I would add that doing bundles after payment is huge. Once a customer has paid, adding 15% to their bill is a very easy sale. Whether a soft good or in the form of version insurance/download protection. Conceivably, it could be done on Saas too, perhaps to lock in the rate for life with a one-time charge.

Cheers.