The availability of a free extension every 30 days is a big benefit to the Python community that may not be immediately obvious. That’s not your standard freemium, as it has all the “features” of the paid product -- full registers, multicore, SIMD and other optimizations – so when we say it’s $600 per year of advanced software, that’s true. Our view is that the free extension every 30 days can make a huge difference to a developer with funding limitations (like us). If that free extension makes their project much more successful, then the entire Python community benefits.
We considered this as an open source project, but we haven’t done that for two reasons:
We have looked for and not found a large enough community of volunteers who have the skills to translate Python directly to assembly language without intermediate representation, and optimize the instructions, to make it open source.
Open source projects are often very underfunded and don’t have enough volunteers even from a larger pool of possible people. For example, at PyCon 2019 Victor Stinner eloquently discussed the funding problems at python.org – a shrinking volunteer base and growing issues list.
If I am wrong and there is a large enough group with the requisite skills, then of course we’re very open to the idea of open source, but the technologies used are very leading edge. And again, if you view it with nuance, the $600 a year (12 extensions) could make a huge difference to an under-funded project, of which there are many!