While this is not a nice, I don't understand why this is a big deal? And why anyone would pirate the game as a result of this 2 Dollars increase (which in percentage as ~33% increase sounds worse than it is). Others are doing this too, adjust the price after long period of supporting it. And for such a low price and as an indie developer, I think it's only fair. Also for anyone thinking of pirating the game out of principle, rethink it again. Game gets deals over time and at some point it was available for ~4 Euros (which should be more like 3.79 Dollars or whatever it might be).
The game in question is https://store.steampowered.com/app/1846170/Iron_Lung/ BTW. It has Very Positive reviews on Steam and is a horror themed short game. And the dev doesn't even come up with fake excuses or anything like that, it's straight honest about making more money. Which is fair to me! And before anyone accuses me, I am not affiliated with the dev or game, never purchased or received anything; it's the first time I hear about the game. Just mentioning it, because of my positive words defending the price increase. This is a rare situation where I am fine with it.