Wow, that was... stupid. Where to begin.
The division was shut down. Who implied it wasn't?
And no, they did not recieve a pay raise. You do know that HP starting pay is $16.13? HP starting pay is lower than what anyone at MDA was making (not sure what MDA starting pay was as no one ever started there- your pay was based on your longevity with US). I personally gained a dollar and lost a block upon return to mainline (east), so make less money now than I did during MDA, but don't rely on it for my income at this time so don't go for most time or do ETB.
Coincidentally, MDA's replacement, Republic's F/As also make more starting than HP, as does Piedmont Airlines F/As.
So no, no US F/A, MDA or not, ever recieved a pay raise by going to HP.
I did not accept any offer of employment at HP, so cannot speak for that.
Give us your point again please.
Oh, and I don't have to try, it's effortless.