Benjamin Robinson, 30, Wayne Shiel, 35, and Daniel Hutchinson, 24, took posing and grinning selfies after the thefts.
North Yorkshire Police found more than 3,000 pounds in cash, balaclavas and a screwdriver when they were stopped in their car in Skipton in June 2014.
They admitted conspiracy to steal at a previous court hearing on November 23.
The trio wore balaclavas to disguise themselves during the fruit machine raids, which they carried out across the UK, the force said.
Speaking outside Bradford Crown Court after their previous hearing, Robinson said: "I don't care that {I'm} guilty. I'm not bothered mate. I love it mate."
During a search of their vehicle, police recovered more than a thousand 1 pound coins and 2,000 pounds in notes.
Detective Chief Inspector Matt Walker, of North Yorkshire Police, said: "We knew we hit the jackpot when we investigated these three lemons."
"These offenders carried out a string of crimes with no thought for the businesses they were targeting - but ultimately their greed, arrogance and affinity for selfies proved to be their downfall," Walker was quoted as saying by the BBC.
The third robber, Shiel is due to be sentenced in August, the report said.
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