Merge Boost

The Million Merge Boost (MMB or simply Merge Boost) is a feature introduced in the 7.4 Update, which can be unlocked at a x450 Stars Tree Upgrade and gives huge boosts.

Unlock
It is unlocked at a Tree Upgrade, available at x450 Stars: "Get a x1.05 Magnet Boost every 1 Million Merges".

Effect
Each 1 Million (1.000.000) Total Merges you've done, no matter if you had the upgrade before or not, you will get 5% more magnets from all sources, similiar to the v3.

The reason why this is considered one of the most helpful upgrade: It is the only magnet giving thing in the whole game that works multiplicative. Instead of an additive 5% / 1 million merges which would give a 10% boost after 2M, 15% after 3M etc., it puts those 5% on the production every 1M. Example: You get 1000 magnets / magnet in a storm, have 2.3 million merges and then unlock the MMB; instead of 1100 you would get 1102. This doesn't seems to be strong at all, but it is: While 14 million are close to a x2 boost (Which would be at 20 million if it would be an additive boost), 23 million already give x3 and 33 million x5 magnets.

Affects
All magnet productions, just like Scrapyard v3. This includes:
 * Magnets from storms
 * Magnets from Level Ups
 * Magnets from Team Leagues
 * Magnets from Converting
 * ...and many more

Trivia

 * The Million Merge Boost was suggested by Brickman, who has the most stars and total merges as of September 2019. The exact suggestion was: "Get 5% overall magnetboost per completed million totalmerges (multiplicative)"