Eco/BTDB2

"Different bloon sends will increase your eco by different amounts. Some more powerful bloon sends will even reduce your eco!"

- Quincy's loading screen tips

Eco is a time-based income generation in Bloons TD Battles 2. It works similarly to its previous counterpart, except Bloon Sends in this game are much faster, bloons can be sent faster overall resulting in a faster eco gain, and notably there are much weaker income penalties for stronger bloon types. In fact, bloon sends above MOABs result in an eco penalty, and MOABs just earn no eco rather than losing eco.

Eco is the rate of income gained every 6 seconds. Players earn more eco by sending economic Bloon Sends. Players earn less eco or even lose eco by sending stronger sends. Gaining more eco gives a larger rate of income, extrapolating to a huge profit as time goes by.