I too like to buy games reaching Steam, which I want to/had patroned. For example Startraders is a great game and absolutely worth the cost, if you like Space RPG.
I also hope that Summer of Love and New Earth reach Steam one day, so I can show my appreciation! But as I wrote in another thread, it is important that eroge games on Steam get an age-rating from the Dev and several non-erotic tags, like Dating Sim. That is because several nations and mine is one of them, got cut off from many indie erotic games due to age verification stuff, since Steam went the easiest way about it.
This leads to some rather bizarre circumstances for buying eroges. For instance, one can still buy "The ditzy demons" main VN on our Steam, but not the expansion, which we still get advertisment for!