Needless to say a lot of people went batshit.
Some were calmer.
And just to add fuel to the raging storm, let's all remember that authors are required to sign contracts that include a clause forbidding them from publishing, or arranging to publish, distribute or sell any work which will diminish the value of the work covered in the contract.
Gander, meet sauce.
In one fell swoop Harlequin just diminished the Harlequin brand name.
And worse, what they're telling unagented authors is the only way to get noticed in the slush pile is to pay $600+ to get your book printed first.
Yup, this one's going to be fun to watch.