That’s right. But where’s the money coming from? It’s just that Farmers earn 10% less. So if the number was set to 25% it shouldn’t be much of a problem. It’s just that the intrinsic value of a Safecoin would be higher. Probably not 25% because not all data requested on the network is provided by Apps/Websites/Data from builders. And don’t forget the caching 
So if 50% of data on the network is “farmed” the intrinsic value/cost for a Safecoin would go up 12,5% if Builders would get 25%. Not that big of a deal I think.