That's what effective altruism can offer, marketing that has a good message and leads to good outcomes. Convincing people by logic is no more "inherently good" than convincing people by emotion (at least, I haven't seen anyone provide a convincing proof of either's inherent goodness or badness), it just depends on their preferred method of thinking.

That's not what the original poster is proposing, however. The original poster is proposing convincing people, through social status bonuses, to donate money. The original poster isn't proposing appealing to people's better natures, but through encouraging their baser natures.

That's where the morality enters into it, I believe.