While I am guilty of doing this, Just giving people the Big Blue Button link is not going to do very much, other than perhaps raise awareness of alternatives (which is more my intention at least)
What we need to do, is find people who can install / maintain this software so that companies etc can find people with the skills host an instance for their company. Or set up companues to host instances.
Even we need to get round the fact they are tied in to zoom as so many people are using it, despite the current changes to the terms and conditions, unless people can find an easy swtich alternative ( I don't mean using teams here) they will just carry on using zoom.
A sort of deadlock I can't see a way out of.