[Svip]

Maybe he means the JavaScript code executed on Airbnb's website is not licenced under a free licence and thus nonfree?

[danso]

Yeah that's probably right: https://www.gnu.org/philosophy/javascript-trap.en.html

Ignore my tangent.

[icen]

Here is RMS' piece on nonfree javascript:

https://www.gnu.org/philosophy/javascript-trap