Well, those of us who are trying to grow our accounts have a big incentive to engage by commenting, voting, following, etc. It's hardly torture -- I mean, most of us are happy to vote and reply if another user visits our posts. At the same time, it's obviously self interest because we want to grow our networks.
Still, I guess it's easy enough to understand why people who already have a large stake don't have to work that hard. Also, the sketchier the information that you provide, the less you would probably want to say about it.
Still, many of the whales do take an active interest in growing their following and helping out small fish -- which is really cool. I'm just sort of amazed that the whales in question are still so brazen and shameless after getting called out so many times.
RE: @haejin is stealing YOUR rewards!!! EXPOSING THE TRUTH!