I think the 30% figure is just a goal, not any kind of contractually agreed-upon number. I'm not aware of any recent company information showing exactly how many Horizon pilots have moved on to Alaska. I think the actual number in 2017 (2016?) was closer to 26%. About 100 or so pilots have signed up for the program.

I am not a fan of flow-through programs or the Pathways program, but I wouldn't try to talk anyone out of it. The parameters of the program are so vaguely defined (and the record-sharing requirements so intrusive) that pilots can be rejected for any reason. On the other hand... most of the pilots that apply are getting accepted. I'd be interested in hearing from anyone that had a negative experience with the program.