To sum up what has been said
To put data on the network costs safecoin.
If you put massive amounts on the network to try and “fill it up” then the pricing algorithm will defeat you. As the network fills up the price dramatically rises to put data. So to completely fill it up you will find it costing huge amount for each put in the end.
As the put price increase the farming rate increases as well, but not as much so trying to get coin to keep putting is still a losing scenario and the impossible dream. Assuming the algorithms are reasonable. But it does attract more farmers.
Any pay-the-??? is at a much lower rate than farmers get. (one tenth) so more profitable for a “scammer” to simply farm than attempt to game pay-the-??? . Another reason is caching which will be tuned to both not use too much resources but to also prevent non-trivial gaming of any reward. As you increase the rate of gets so does the amount of caching. And remember the more content the more caching that is available as content is randomly spread across the network. Imagine all those millions of computers (nodes) with many mega bytes of caching each.
Remember payments for farming are based on spare resources and as such are not high. Much harder to game profitably and throw in caching and it gets even harder. You would be better off using your resource to game the advertising market out there as some already are. Mind you it still has not brought down the internet advertising market yet. And its more profitable.