Its an excellent example of one of the nice benefits of MOSCITO's constructive raise structure.
The auction
(P) - 1♦ - (P) - 2♥
(P) - P - (2♠) - X
(P) - P - (3C) - X
(3♠ - P - (P) - X
Systemically, the 1♦ opening promises 4+ hearts, might have a longer minor.
The 2♥ raise shows exactly 3 card trump support and ~ 7-10 HCP
Statistically, after this auction, our side will hold a 7 card trump fit approximately 48% of the time and an 8 card trump fit ~52% of the time. In other words, the Law of Total Tricks doesn't offer much value to the opponents.
Observe what happens when folks get too frisky in the balancing position...

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