@True2me4you CRO received a sponsorship from the Cardano Foundation (CF) that is supposed to help small pools - in this case CRO received 15m for three months. In a way this is an endorsement from the CF that this pool is valuable to the network, community and delegators.
However, the minute they received the sponsorship, they changed the pool margin to from 2% to 99% and fixed cost from 340 to 3400 ADA.
This effectively redirect all rewards to the pool operator. So, they not only steal from the CF but also from all delegators that trusted them. Clearly, they must have expected that the CF will notice and re-delegate a.s.a.p. By that time however they will have received 15 x 750 => 11250 ADA which is clearly a criminal offense.
This incident is a game changer that indirectly hurts every pool operator. I guess, we’ll see how it’ll play out.