If you're already able to pay salaries, you probably don't care, but for small side-project type startups without any funding but with a few people contributing

If you're already able to pay salaries, you probably don't care, but for small side-project type startups without any funding but with a few people contributing, it's a _big_ difference. I suspect this is why JIRA has very different pricing for <=10 and >10 users.