Perhaps you should look into what I have spent in the past when the revenues were higher (never anywhere near as high as EOS though). Hint: I was the main sponsor of busy getting developed, among supporting many other things. There have been numerous periods, even at higher prices when I was literally running negative as a witness for months after paying for initiatives and sponsorships (also ignoring that witness rewards were and are not liquid, including when it took two years to power them down)

So first of all stop talking about things you don't know anything about and second, none of this addresses the question of why EOS BPs currently pay for a lot of development and Steem witnesses currently don't. Looking at the revenues being currently $700K/year vs. $21K/year does explain it.