It's a mixture of a couple things. One is that we tend to run pretty lean and our engineers are all booked up for the foreseeable future. Linux users are a pass

It's a mixture of a couple things. One is that we tend to run pretty lean and our engineers are all booked up for the foreseeable future. Linux users are a passionate community, but we can't quite justify the development time for a market segment that is not very large. Additionally, because we run an unlimited model, a lot of people would immediately sign up and back up their Linux servers for $5/month and we'd sail out of business. We could address that by putting in limits for those types of devices and only allowing certain Linux builds, but that adds complexity and we want to keep the backup side of the service very simple - which works for the vast majority of folks. So it's a combination of a bunch of factors. We hoped that developing B2 APIs and CLIs would give Linux folks something that they could use if they needed to have offsite backups or archives and wanted to use our infrastructure cause we're pretty neat. Long-winded answer, but TL:DR - small market segment, development time/cost, possible abuse.