I believe so, and if its anything like vehicle leasing companies they must make a low risk killing. I looked at the highest paid CEO's in the casino industry. The SM boss is up with the casino big boys. If the figures are right, he earned more in 2003 than Paulson did as a company.
Equipment probably comes with 3rd party maintenance so its not labor intensive either. I wonder if the SM 'chips' are even made by them - they look suspiciously like Mikohn.

Of course Ive no idea what SM does outside the US. I will see them at the London expo next week - will be interesting to see what they are actually 'selling'