The one person who is full-time has a very different salary:

> we settled on $11,000 per month as a baseline salary for working full-time on open source

The people getting $2,000 per month are part-time:

> a "part-time" rate: we could initially afford $2,000 USD per month.

It is also explained that if possible, they would go full-time and the salary would then be raised to "the full-time rate".

> Our hope was by announcing this plan and continuing our fundraising efforts, we would be able to increase the budget and raise them to the full-time rate.