I am sure with some forward planning, the programers and designers would have these bases covered.
It's just a search after reading what's on offer from link to link and a link had me arrive here to this forum.
There are other forums with more information describing similar ideas and projects but none yet on horse racing as far as I know.
So why if these other projects work on the basis of open source code and have expanded on a global scale and not with horse racing projects of open source code ?

Would the people interested be aware of the free download rather than pay for a program dressed up with similar functions as you describe ?

Would it be "better" if one programmer keeps updating the program rather than a team adding ideas,updates and upgrades from the users of the program ?
I think the programmer would go insane trying to market each copied idea on their own. By the time a sale is made to cover costs, then another update may come from the original by the team doing the project.

This is not a personal dig, I can see you are trying to explain in broader terms as an advocate, thats fine.