[cycomanic]

You make a compelling argument except for ignoring the fact that many licences (in particular patent licences) work on percentages of sales or revenue. So it seems not to be a problem in those cases, why is it for software?

[prepend]

I’m sure there’s some software that works on percent of sales or something. But it’s not common. I’ve worked on some fixed cost, percent value contracts and they had very distinct parameters unique to the contract and they weren’t very good for generalization (eg, “your foo process costs $50M today, I’m going to deliver changes that reduce that cost, I want 50% of the cost reduction” with tons of pages of caveats and details and stuff).

I’m not saying that PostOpen is impossible or can never be used anywhere. Just that it sucks and is not feasible for broad use.