Nop, the rewards are what they are. But operators have to pay for the servers in $. If we were to sell all rewards to cover our servers we would most likely cover the cost but thats about it. If we all started doing this, the price would collapse and make snodes unprofitable. Now some might argue that operators should cover the expense. However, they are likely not count risk (lets face it this is a long shot when it comes to investments), work (even if running apt-get install everyonce in a while time is money), etc..
Let's use some real world numbers. Node returns 300 Loki per month x ~$.40 / Loki = $120 fiat. Node cost I dunno lets say average $15-20. so the ratio in this example is $120 returns to $20 for a VPS. Net $100. If Loki goes to $.50 then net an additional $30 so $130 net. Someone verify my maths please.
so if 3/4 of $120 is coming from elsewhere that's net $9 coming in and you are making up the rest from your end. 25% stake is grossing $30 + $9 = $39. At 10% if I read you correctly you need a VPS that costs $12 or less?