@Elucidating that's still #AssholeLicensing.
Compared to @ubuntu which when I asked them via eMail [years ago] about #preinstalling #UbuntuLTS went like:
'Shure you can do that and sell the systems and provide commercial support as an MSP. Just make shure you don't claim to be affiliated or endorsed by us and follow our trademark guidelines.'
And I'm shure if I were in the business of offering managed #Zulip Servers for customers, I'm shure @zulip wouldn't mind that as long as either stick to the #FLOSS'd version or appropriately license that for customers and not claim to be endorsed or affiliated with Zulip....