I had noticed that the pace of transfer had really slowed down and I had been accumulating a few MyPoints but didn't want to have more than one transfer in process at a time, my last two transfers posted March 10 and April 22, so I was going to do another today when I discovered for myself HHonors is gone.
I earn a bulk of my MyPoints through Priceline (3 points/dollar) and Office Depot (tiered offer, 1,000 - 2,000 points per order for me typically). I may just switch to cash for Priceline (3% back from FatCash) and continue to use MyPoints for Office Depot and respond to email offers as usual and then transfer to United. It's a real shame that they've gotten rid of both HHonors and Marriott Rewards.