It's the 'long tail' sales period that helps: Watchmen is still coming up with 20-30 grand a month because people still know the name. 5-10 years from now, who will remember Hellblazer? You think JLD/Constantine trades will outperform the Hellblazer trades, and their back catalogue, fair enough. After all, you're the - choke - 'expert'...
What blame? DC are making a business move, some fans are not happy, I can see why they're not happy. Your knee jerk urge to defend anything DC do is still vaguely disturbing. Maybe you should either drink the Koolaid or bathe in it, not both?
Fan responsibilities? Buy the books you enjoy, don't buy books you don't enjoy, provide honest feedback to publishers on which are which and why.
Beyond that, as paying customers, they're already keeping people in work. Including you.