I'm on the same side of the argument as you and indeed I believe I feel as strongly about it as you. Especially in regards to brushing it off, calling them script kiddies[1], generally being "well aw shucks aren't I great for not deleting my copy of the data, I'm so great"[2] about the whole thing grinds my gears too.
I'm saying whoever is ransoming the data already has the data, the data is out of Newsblur's control, therefore the data is already leaked.
The data leak is past tense. It has already happened, not will happen. No amount of money will undo that. If that means they've lost you as a customer, that's how it is.
What we now need to know is what data was leaked?
[1]: which to be fair Newsblur, they are, but if a script kiddie hacks you using something so basic as a missing firewall rule.. Arguably not knowing Docker's quirks but using it anyway is the same damn thing as what script kiddies do. Sys kiddie if you will.
[2]: Why is that cause for celebration? Do you not have backups?