I know Microsoft tried to kill Linuxfest Northwest a few years back, sponsoring it and taking control of 1/3 of the floor space, both approved afterpartys, etc. This year they had a small booth that was staffed for one of the two days...
Most of the people I know stopped going to LFNW after the shitshow that was that year, they still attend SeaGL and other conventions.
The exploding can of WD-40 that MS handed out that year was the cherry on top of the hijacking of the main space, fake Azure credits, and poorly run afterparty that MS put on.
Frankly, MS should not have been allowed to hijack LFNW that year. This year MS was the only booth to not staff on Sunday, I'd hope LFNW doesn't waste table space next year.