There is no formal "flow-through" agreement at Alaska/Horizon, but historically (including the most recent new hire class, according to a friend who is in this class) has had at least a couple Horizon pilots in each one.
So Surplus, AS makes it a point to hire QX pilots in every new hire class without "furlough protection" for the mainline guys, without a "flow-back" arrangement, or without anything else that is at the "expense of the regional pilots".
The whole world is not out to get you and your regional brothers, no matter how hard you strive to convince us otherwise with your unending rhetoric, metaphors and extreme melodrama.

But it makes for entertaing reading. For at least 30 seconds or so. Or after one had read the same tired old phrases for the 68,000th time.