Again it bears repeating [0] that if you don't pay for your tools and expect open source maintainers to do it for free, then they will most certainly take funding from VCs and angels instead.

Now they have raised $6M in funding. [1]

Do not be surprised to realize that open source does not pay their bills.

[0] https://news.ycombinator.com/item?id=49201743

[1] https://herdr.dev/blog/herdr-raised-a-seed/