Just submitted my weekly "crew comment", and I was rather frustrated by how much time I was shorted because of the "Block or Better" loop hole, so I wanted to just get some clarification from you fine gentlemen. I am on reserve, my pairing was "modified" to include more flying and additional days. This is just about every pairing for reserves. It is my understanding that because the pairing was "modified" I am only due original pairing value, or ACTUAL block hours flown, whichever is greater. What I haven't had time to look up was whether or not this same rule applies to line holders. If it does, I am curious as to how often line holders are being "modified". Example: A line holder has an 18 hour 4 day, on day 2 they are reassigned to additional flying to a different overnight, and then meet up with their original pairing the following day. Say the additional flying adds 4 hours of block credit to the trip value, making it 22 hours of scheduled block time. Will all the soft time from coming in under block on previous flights be negated?