Most of our people are too busy just with "today", than to get very involved with politics. To them, Pebble is "that mine they're talking about". Small minorities on both sides are making most of the noise about Pebble, while the rest are only sorta listening.
ANCSA got almost every Alaskan Native actively involved, because it was going to affect all of us forever. Pebble is a regional thing, and few outside it can be effectively drawn into the middle of it, become actively involved ... largely because the "facts" are not clear, having been muddied up by globalization activists agendas.
Look at ADN comments. Just a hand-full of commentators on this issue. There you have it, only the few us care enough to be vocal, actively advocate our positions.