Having your game on steam doesn't always mean it will get more views. That is a commonth myth told by developers, it was once possable before the greenlight but now it is not. It is also important to understand that Steam really hates VN and putting a VN in steam is like playing russian roulette. Valve will never refund you either, the $100 belongs to Valve the moment you send them the money.
Marking is always the best way to get people to buy anything, it is always the way it has been for games.