Vote for yourself!
There hasn't been a reason not to so far.
Personally I haven't been doing it lately but I think it may be reasonable to take this approach:
If you can't find great content on Steemit, worthy of an upvote, upvote yourself as a reward for looking for it.
Until a circular economy is developed there is no reason to not do that.
You could also loan out your SP and have a better return, vs just selling it. And that way you still help out by not sucking up the rewards pool.
Yes, I have been considering renting out my SP, or powering it down and investing in a Steemy project.
Awesome! I have a couple tricks up my sleeve if I can ever find the time.
And what it's a Steemy project? Sorry, newbie here haha
Can you rent your SP? How? :o
You can delegate it to someone like Smartsteem.com and they give you ROI plus your delegation back at the end of whatever period it is.