This Advfn, Ihub, or PlusoneCoin.org suffered a 51% attack all week long. Someone loaded up a bunch of plusonecoin network servers, then ran up the hash to nearly 20X the average rate (about 3-4.5TH/s) for an HMQ1725 coin, and mined it from nearly .06 cents to .004 and left. All while lowering the difficult to next to nothing.
They appear to have left now that there's nothing left.
Can read about it here.. The admins don't want to talk about it.
https://investorshub.advfn.com/PlusOneCoin-PLUS1USD-32755