Good luck!Nah, unfortunately that would be too costly I'm afraid, and especially for as a reward to a game that's entirely optional.
Yes, that might be a good idea. I still need to think this over. There's quite a long road ahead anyway before I managed to actually get my page published. I need to explain what the sex content is in details to the Steam team, and I also want to have a nice trailer that goes along the game to showcase its features, because graphics aren't all that appealing in screenshot^^
if you are having too much problems maybe try to reach out to other developer publishing games like this on steam.
I believe the developers of the "Star knightess Aura" game also plan on releasing it on steam, maybe they can give you tips