Using @randowhale and @minnowbooster, it is okay but do not too often to use them.
I just make analogy thinking about this. It is like an election (for example : headman village election in Indonesia, yes there are many villages in Indonesia have this event ). Sometimes The candidates pay they followers (villagers) to get their vote. It is like as kind of money politic for my personal opinion.
So Why don't we try to make blank posting or just make a "whatever" article and then pay SBD to @randowhale and @minnowbooster. Then wait for ther result.
Ha..ha.. ! using @randowhale and @minnowbooster is like as using canabis, we have to use them wisely and carefully. If we are not using carefully then we will become @randowhale and @minnowbooster addicts.
as I replied to someone else... If you are going to use any of these services, it would truly be a waste of money to try using it on anything but your best quality posts. I'd even posit to say every post you make should be terrific and well thought out in it's own way.
This is your true calling card, and any attempts to attract more attention to yourself for mediocre content will likely attract little more than cold disdain and few (if any) new followers (and possibly even some a bunch of unfollows)!
So yes, I definitely agree with what you wrote: "we have to use them wisely and carefully."