Free version = 10 scenes limit, no builds.
Full version = no limit, builds for all platforms.
We aren't big enough to do something like Unity "you can do anything as long you're smaller than 100,000 a year". We only have one customer that is like that and they pay for much of my time. And I think 50 bucks for a life time support of Vis5 is not too bad (or as long V6 comes a long, which won't be in the next 5 years probably