Originally Posted by e6bpilot

It's a trap. Don't do it unless you live in domicile and there is lots of reserve coverage or unless you are on probation looking for second year pay.
You will almost certainly get an open time pairing with none of the same protections as a lineholder. Better to just bid straight on an open time pairing. Pretty much anything that flies on the east coast these days is a great way to make extra money.