I've just been kind of playing it by ear for now, and trying to cycle through the liquid rewards I got from a post where I was the recipient of a vote from @curie. I've only been using the services on posts that I feel are of pretty decent quality (moderate length write-up, and some informative pictures, with links to external sources that I talk about). To date, I've probably been using them more than what you may consider to be ideal -- but with low amounts -- 1SBD here, 1SBD there, kind of thing.
For what it's worth -- I've been searching around for some guidance on whats appropriate use of these services and what isn't. I see the kerfuffle with grumpycat and others regarding these, so I'm trying to be cautious. I wouldn't mind hearing your thoughts on the matter.
Ok perhaps make a post including that and the reasons why you do it, you never know...
Challenge accepted.