I read it as how much money do you make off it it...
It's more like an extremely generous and lenient licensing system by Scirra, as they trust in you to honor their system. If you have made $5000 with it, a one time $300 upgrade should not be outside of your ability.
That's exactly what I thought!
I bought the personal license and plan on keeping records. This is my first actual potential sale and I wanted to actually keep a record from the first.
I agree that if I can pull off $5,000 from this sort of work, the upgrade will be easy - if I see it working well I wont even wait that long - but I wasn't sure about how to count sales where the client profits from the project. Now that I think of it - is the customer limited to $5,000? in theory?
I'm new to this sort of thing and my brain is made entirely out of wood, so I ask odd questions