I dug up the citations for Kee:
> In October of 1973, Bushnell decided to grab as much market share as possible by signing exclusive contracts with distributors in each geographic area to buy only Atari games.
Because most geographic areas had two distributors, Bushnell separately (and semi-secretly) created Kee Games, named after Bushnell friend Joseph Keenan who became president of the company. Kee would sign exclusive contracts with the second distributor in a geographic area. The games that Kee and Atari produced individually were eventually released by both companies with unique names and some cosmetic differences.
> Spike Was Kee’s copy of Atari’s Rebound. Kee’s products were mostly copies of Atari’s games with innovative features added to differentiate them from their Atari cousins, and create the feeling of a “rivalry” between the two companies.
> Tank was the game that saved Atari from bankruptcy in 1974. The game became so popular that the exclusivity agreements Atari demanded from distributors were thrown out the window. Everybody wanted it, and Atari made sure they got it. Bushnell’s cash flow problems at Atari were suddenly reversed. Atari and Kee merged at the end of 1974.
https://www.gamedeveloper.com/business/the-history-of-atari-...