Unfortunately, most hosting companies don't go public and warn their users. They try to hide and hope nobody else finds out.
Glad to see them going public, warning their users and doing the right thing.
Let me ask you something - what do you see as the benefit to going public vs. not "doing the right thing". I mean that by airing dirty laundry you also run the risk of losing customers. Are you sure that the goodwill earned by doing this outweighs the downside of airing your dirty laundry? [1]
[1] I am remembering a time long ago when a business owner told me about something personal that an employee told them. The business owner said "that was stupid that they told me that, so I fired them". This idea that all people in the world view things as generously as you might most likely hasn't been proven out in research (I am guessing..)
Whereas if I never hear about stuff (or worse, I discover stuff way after the fact) then I don't have much of a basis for knowing if there is any system at all.
For instance, I don't mind getting a spam email or two when I open my email box in the morning, because then I am sure that it's working :D
I don't know how sound or rational that feeling is, but I understand it.
To this date, the breaches were not disclosed publicly.