It is not a fraud, to anounce there will be anouncement:) So dumping hard on big buy walls is not fraud, since nothing was promised. They can still anounce there will be no sale nd they are fine:) But this doesn't seem likely. If that was the plan, there will be more pumping and more broader promotion on chats and forums. I hope it was just manipulation + panic selling, or just a stolen account.
I'm not sure who you think "they" are but Karmashares members cannot dump the coins held in the Karma fund without all members voting on it.
members being the people who own Karmashares.
so yes if there was dumping happening from the Karmashares fund then it would be a fraud because it is in clear breach of the code of conduct.
as for the so called "devs" the original developer left a long time ago the only other "devs" are people who are hired to maintain the code and volunteers.
I believe they are not major Karma holders and I think they might even be paid in BTC for their work. But either way, since this coin was not premined all the Karma they own, they had to either work for or purchase so they (ie the devs) can do whatever they want with the coins they hold.