[[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]]
"We would like to highlight that an online conference hosted 30,000 participants using only free software (Matrix and Jitsi only) https://matrix.org/blog/2021/02/15/how-we-hosted-fosdem-2021-on-matrix/. It shows that for large conferences also we need not depend on proprietary software." without mentioning their name.
There's no need to hide the fact that it was FOSDEM. The old text about FOSDEM is basically good -- just please describe LibrePlanet first, FOSDEM second.