Did Janeway's death help the franchise, not affect it, or hurt it? I think it hurt it by driving away fans who now refuse to buy books. Are they being stupid and missing out some great works by Kristen Beyer? Yes. Should the editors have expected that and not made the bonehead move? Also yes.
How many people blackbanned the book? If you check the VOY thread, and the one where they were setting questions for Kristen Beyer to answer at her Shore Leave panel, you're talking about 20 to 30 fans max. And some of those did come around to trying "Full Circle" and beyond.
So Margaret Clark
's "bonehead move" pissed off about twenty people but intrigued possibly hundreds to pick up the book, and then read the refreshed relaunch.