I was expecting 20USD. 30~40USD is very expensive for a game that had it's development costs covered by crowdfunding. Some developers need to face the risk of the game facing poor sales and ending up in debt. So it's not really a fair value.
Also, take, for example, The Witcher 3: It had over 30 million budget. But its price was only 50USD. 10x the money spent on development for only 1,6x the price.
Still, I honestly wish them the best. I hope they get a lot of money and continue creating 'high budget' porn games. But I'm not really inclined to support them for that value.