I think it's perfectly fine for FOSS projects to use non-FOSS. This article is a wee bit on the fanatical side for my taste, and I'm the guy who bought the lemo

I think it's perfectly fine for FOSS projects to use non-FOSS. This article is a wee bit on the fanatical side for my taste, and I'm the guy who bought the lemote. ;) A public FOSS project should be able to use whatever they want for bug management, issue management, support, and other things that do not affect the core project in any way if compromised or monitored. Especially if the company behind said product even give out discounts or free usage accounts to such projects like Atlassian or github.