That $10 is a bait and switch price.

The next tier is 25 users for $2500. So it went from $1 per user to $100 per user.

JIRA is, by its nature, a multi-user software. The $10 for 10 users is clearly engineered to get small teams to commit to using it and then squeeze them when they grow.

That is a reasonable strategy for what is a product for companies i.e. enterprise software.

It wouldn't work for a product that is primarily for people who are paying from their own pocket, like, I assume, everyone here that expressed the want for a self-hosted version.

In a personal use case you more than likely stay below 10 users forever. If you are a company paying multiple employees 2500 should be easy to justify: that's 25 users at 10$/month for Jira Cloud would cost you 2500 in 10 months, with hosted Jira it's just a one time payment