American Independence Day Collection Event (BTD6)

Collection Event was an event in Bloons TD 6 released on 2nd July 2019 with an update 11.0. The player received fireworks for every finished map, together with ordinary rewards such as Monkey Money or medals. A number of fireworks was based on a game and track difficulty. After collecting a certain ammount of fireworks, the player was rewarded with a crate. After opening the crate, the player received two (or three on later stages) Insta-Monkeys. As the player collected more fireworks, the crates increased in quality, requiring more fireworks to open but yielding higher quality Insta-Monkeys in turn.

In 2019, the American Independence Collection Event lasted 12 days, from July 2nd to July TBAth.

Firework rewards
Firework rewards for finishing a map were following:

Crate rewards
Each new tier of crate was unlocked depending on the number of fireworks collected:
 * Wooden Crate (Tier-1) - Default
 * Bronze Crate (Tier-2) - 100
 * Silver Crate (Tier-3) - 250
 * Golden Crate (Tier-4) - 450
 * Diamond Crate (Tier-5) - 1000

Each type of crate required a specific amount of fireworks before being allowed to collect the crate's special Instamonkey rewards:
 * Wooden Crate (Tier-1) - 20
 * Bronze Crate (Tier-2) - 30
 * Silver Crate (Tier-3) - 40
 * Golden Crate (Tier-4) - 50
 * Diamond Crate (Tier-5) - 70

Each type of crate rewarded the following Instamonkeys:
 * Wooden Crate (Tier-1) - 2 Instamonkeys, Tier-1 (high change) and Tier-2 (low chance)
 * Bronze Crate (Tier-2) - 2 Instamonkeys, Tier-1 (low chance), Tier-2 (high chance) and Tier-3 (low chance)
 * Silver Crate (Tier-3) - 2 Instamonkeys, Tier-2 (high chance) and Tier-3 (low chance)
 * Golden Crate (Tier-4) - 2 Instamonkeys, Tier-3 (high chance) and Tier-4 (low chance)
 * Diamond Crate (Tier-5) - 2 or 3 Instamonkeys, Tier-3 (low chance), Tier-4 (high chance) and Tier-5 (low chance)

Trivia

 * Deflation rewards are nerfed upon first release. In fact, the rewards for fireworks have dropped even greater, minusing 1 for Deflation on Intermediate to Expert