Steam does not have the spirit of an open platform like they once did; they are quite self righteous now. They actively practice anti-consumer/anti-small business practices now. They only serve and bend to the needs of massively successful publishers. The drop in revenue is likely due to people not being satisfied with seeing you have to compromise your original vision in order to placate a third-party. Alternatively, it could just be the difficult economic times felts around much of Europe and the west. Honestly I was hoping it would work out for you as we need more art, even immoral kinds, to flourish.