We found out recently that Jason didn't like the perks because the assets and jingles were expensive. This doesn't explain why he removed the Jingles from Origins and Mob though… If anything… he spent more money removing the jingles for his maps on Bo2. And on Bo3… SoE had crazy new jingles by an orchestra. And on Bo4 he completely dumped them. And we know what happened after that.
Imo… he was so obsessed about the story and maps that he completely forgot the iconic important things about Zombies.
Look at the Victis crew maps… 3 new amazing perk jingles– (Tombstone, Who's Who, and Vulture Aid). Meanwhile: Jason ignores Electric Cherry. Money wasn't the issue… it was him and his maps. I don't think he understood how important the small things were… even something as simple as a stupid jingle.
(Back to Bo3) -> Remember Revelations? Jason decided to give a lore reason for why the Perk Machines had jingles. The jingles were a joke in Bo1. You can literally hear the singers laughing at the end of the songs in the official jingles (Quick Revive is the most noticeable). Even Elena jumped in on it and did Juggernog. This wasn't some grand expressive thing they decided to do… it was pointless fun they did in their free time. It never needed lore. And it was never expensive. I'm calling BS on Jason (idc). Screw him for removing the perks on Bo4.