Hey!
In some ways, the mode is still very similar to what we had very early in the project. Cashout and Quick Cash are based on a mode that was originally called 'Download' and over the course of time we tried 100s of different objective types and team and tournament configurations. For example, at one point all Vaults were hidden at the start of the round and the teams had to search for them, with them only being revealed to other teams if they spotted them themselves or if the cashout started.
I think the biggest change is that the game mode was originally a 'single life' mode. If your team was eliminated and all three members died, you were out of the tournament there and then! Overall, this made the game much slower paced and tactical. Single life led to a lot of tournament format issues though, with matches often finishing at very different times, so in the end we decided to introduce respawn systems.