Even beyond the variants, supposedly Walmart bought a boatload of them to package and sell. So they were seriously inflated sales. I order all my comics online and it's ridiculous how many variants they put out. Immortal Hulk is actually a great book, but it still has anywhere from 5-10 variant covers each month. And since the early issues are so hot on the spec market, that raises the numbers for new issues as people chase variants and whatnot. It's all inflated numbers.
The shift into the younger reader TPB books and those imprints is probably the best step DC has done. But yes, Didio and Lee are not the minds to bridge the gap into the next generation. They are trying with this stuff, but I am more and more convinced Didio simply doesn't have the ideas to bridge this gap. I listened to Tom King's recent Word Balloon interview talking about the Walmart books being all ages and bringing in new readers, then go onto half acknowledge he messed up and half defend his Superman anxiety attack Lois Lane murder issue. An all ages, new reader friendly book isn't the place for that kind of story. They can't grasp that, because they are trying to write the next Watchmen constantly. There's nothing all ages or new reader friendly about that book or King's Superman story in general which has been overly grim, dark and broody. But "DC loved it" he says. Because Didio doesn't get any of this at all.