DDOS App Farming

I’ll try to add some insight here. I’m going to rephrase your question.

Can bot accounts simulate popular demand of an APP?

It’s hard to tell how effective this attack will be without TestNet3.

If it were possible, there are alternative solutions discussed on App Developer Rewards (Discussion).

The PUT incentive addresses this kind of exploit. It pays the APP Dev based on Safecoin received from PUTS generated by the APP. In other words, your APP can only make money if users spend Safecoin to use it.