The truth is, i think these poker sites do little themselves other than come up with a name, choose who to sign as Pro's, and make contracts with third parties and affiliates and some marketing (but this is also mostly in the hands of others or by contacting others.
Website design? Not hiring anybody, just pay someone to do it once. Support as a whole i'm sure is often a third party aswell (not saying it's the case with Lock, but it's possible). Payment processing? third party (this is standard, also for security: you really don't want to run a poker site that stores credit card information, etc.. poker site without it is probably enough of a target to hackers already.
Servers? Probably simply paying another company to sort that aswell.
And really this isn't just Lock, i'm sure it's the same with any site, guess Lock either picks bad/cheap..
Look at Lock as Ryanair, Aldi/Lidl, Wall Mart in the US is the cheap shop?
Everything in the name of dropping the price for the product as low as possible (the rake), but ofcourse, this has to come from cutting down in costs somewhere else. In all the above mentioned, it's usually by cutting down on salary for personel, safety, stability.. For example Ryanair pressures pilots into tanking as little Kerosine as possible to reduce the weight of the plane, and thus reduce the kerosine spent, all to reduce costs, but at the cost of safety.