[hardwaresofton]

Right, so then... pay for Slack. Leaving negative comments about such a general "problem" with open source software isn't really productive or warranted, I think.

It's not the open source project's job to make themselves appealing to you, you're just looking to use and use and not give back.

Also, the benefits (intrinsic or otherwise) of open source is a completely different discussion (that people have by and large already had).