1) this is a life-cycle thing. the game has only been released for 3 weeks and has no marketing budget (i assume since it's only sold a couple hundred copies). that means, it's still too early to tell if the piracy correctly acts as "free advertising" or not. grassroots advocacy is NOT overnight.
2) piracy has been proven over and over again NOT to lead to lost sales by objective measurements. anecdote? sure! everyone is getting completely screwed when you take in anecdote. for examples, just google "game piracy lost sales" and read things from industry news sites (techdirt, for example) to developers (notch as another example) on why that statement is a load of crap. or, alternatively, you can just check this research paper outlaying the data and methods (pdf warning!): http://www.mit.edu/~ke23793/papers/Drahchenetal_paperID16.pd...
basically, we, as a community should simply wait another 5 weeks (october 1st, maybe?), then ask the developer for a post mortem to see if they've only made another 350 sales or so. and when they say "whoa! we've exploded!", we can say "but i thought piracy stole all your sales."
m3mnoch.