That actually makes a lot of sense given the fact that i havent heard about massive steam data centers. I suppose they just rent their servers from data centers around the world. Which actually is very suprising. I imagine at their scale making their own data centers would save them money.
Actually i just think they must subcontract a lot of their daily operation. I refuse to belive such low numbers are enough to even handle the complaints from stolen shipments and broken devices not to mention all the other complaints. It is more than enough to actually develop the platform but surely not to handle day to day operations.