Actually, the main reason is that after a certain number of nodes are sold by Gala Games they increase the price, in ETH. So I'm assuming that the price (quantity of ETH) will be a lot higher in a year, and also that the price of ETH per USD will also be higher. So in a year I would need a lot more money than I paid for this node just for the next node.
I probably won't even buy another node given that fact.... People who got in early with node purchases really were able to make out great, because they could generate enough GALA, so quickly, they could then just buy another node. You can tell there are quite a lot of addresses that own a bunch of nodes, but then again there are a bunch of addresses that just own 1 node like myself.
Hope that answered your question.
RE: Gala Games - A Node Operators Musings