Yeah they were frustratingly bad systems. I was a huge bo3 fan and it made me really sad that I couldn't use any of the cool new guns because I had bad luck on the slot machines :(
IMO Advanced warfare was worse because it locked some guns behind the crates, and also locked a ton of "variants" behind crates that were objectively better than the base gun
Advanced warfare set the precedent. Black ops 3 made it slightly less of a slot machine, but it was still garbage.
Gecko is open source. They were saying it would be good to have a new FOSS browser engine that isn't Chromium or Gecko to add some competition to the mix
Season 1 and 2 are total garbage. I quite enjoyed season 3 but YMMV. Season 3 is definitely worth a watch to form your own opinion
https://einstein-schrodinger.com/mercury_colony.html