Thanks for that, it was always unclear in my mind, now it's clear!

ok so I'll move it to LGPL soon then ;)

Yep, This is what I want for Illuminated.js. I prefer to have benefits of the library modifications. It's a bit more restrictive coming from MIT (I used to use it for some projects) but it's not as restrictive as a "non-commercial only" license, so IMO it's quite ok, it's a minimum of thanks to the library.

Regards