It's not just storage, but content distribution too. So, locality matters a lot, and it will be favorable to have storage close to users. Also, even if it was '

It's not just storage, but content distribution too. So, locality matters a lot, and it will be favorable to have storage close to users. Also, even if it was 'centralized' only to few players, the economics would be similar to the current situation; it's more profitable to keep the operation running than to close it. I'm not even sure what you mean by 'run off with the coins', as the hosts don't really have any coin to run with. They should only earn when they fulfill the contracts. I'm not sure about Filecoin, but in Sia hosts are required to put up a 'collateral' which they lose if they don't fulfill the contract. Edit: Running multiple accounts from a single datacenter will increase the hosts risk to lose the files and money.