So using my algorithm, I calculated out score and electrum gains for several decks with and without spins.
I can post this for all decks in a more organized fashion, but here is some raw data for your viewing pleasure.
Non EM decks
V2 fire
spins:
games/hour: 54, score/hour: 982, electrum/hour: 2241.
no spins:
games/hour: 61, score/hour: 1110, electrum/hour: 1128.
antlion shrieker rush
spins:
games/hour: 53, score/hour: 941, electrum/hour: 2163.
no spins:
games/hour: 61, score/hour: 1083, electrum/hour: 1087.
mindless ruby dragons
spins:
games/hour: 47, score/hour: 875, electrum/hour: 1971.
no spins:
games/hour: 53, score/hour: 987, electrum/hour: 1004.
EM decks
Life EM deck
spins:
games/hour: 49, score/hour: 1480, electrum/hour: 2783.
no spins:
games/hour: 55, score/hour: 1661, electrum/hour: 1859.
Healbow
spins:
games/hour: 40, score/hour: 1137, electrum/hour: 2185.
no spins:
games/hour: 44, score/hour: 1250, electrum/hour: 1391.
Dark EM
spins:
games/hour: 36, score/hour: 991, electrum/hour: 1905.
no spins:
games/hour: 39, score/hour: 1073, electrum/hour: 1167.
Lots of data to interpret here, so I'll let you digest it before I add commentary.