This can become an interesting market, a user is willing to pay 1k sats/year for his file to be hosted, 1 server accepts it, a second one comes along, so now it's 500 sats to each one, if the split value get too low no more servers will appear, some can even pull out, but there will be a equilibrium ans maybe you have enough redundancy for your file, if it's not enough you have to increase your budget. Servers will constantly compete for a share of your payment, they will compete to provide a service for you and they would be able to see all the competition, it's like bitcoin miners fighting for the block reward.