I am pretty sure from the beginning that reaching 3m for most people is rather not logical.

In fact, the reward past 1m4, 1m5 is not that much (except for the hammer sit at 3m) compare to the lower tier reward. They are luxurious stuff( including a total of 40 tickets, 20 souls points,1 premium gacha draw(300 gems) a)

While below that you get around 160 tickets, 80 souls,1 premium gacha draw(300 gems) already when u reach 1.5m

So u have to double your effort to receive less than 25% of extra reward(considering that at this point u are at 150 souls red/blue) already. It worth the it? probably for some, but mostly not.

So you should be feeling ok if u are over 1m at this points and already finish getting enough red/blue souls.