Well sorta...
I used to fly IAD LHR all the time as a reserve. It was a lousy paying three day and that's why it fell into open all the time. Guys would dump it. Now, you could argue if the 767 is a true WB or not, but the bottom line is that not all three day trips pay that kind of coin. Anything western EU from the NE isn't going to pay like that. Ask the dudes on the west coast who do the Hawaii flying. Those trips used to end up in open and I'd DH FC to and from the west coast to fly them. It was a horrible paying trip for them, but for me with the DH pay great. Sure HI is great, but if you end up flying it constantly you need to fly 20 days to make 80ish hours. Again, there was a reason they were dumped and it was for low pay for TAFB.
That's back when being on reserve at UAL was pretty sweet. Of course, I used to wear 34 trousers and have 20-13 eyesight as well.