Boldly asserting that all grants will be made exclusively for charitable or educational purposes does nothing to change the character of the grant. If you're giving money to someone for commercial product development then you're giving money to someone for commercial product development ... and if that constitutes the majority of what you do then you've got a major problem.

OSE won't give money for commercial product development - it is dedicated to supporting existing highly-used _nonprofit_ and independent OSS. Some specific examples are at https://endowment.dev/faq/#grants