Much obliged

[Jessica]

Much obliged means that whatever was done is appreciated. Literally, it could be extended to mean that the person that says Much obliged now owes the other a favor. That the one that is obliged is under an obligation to pay back. Most people wouldnt expect a return favor though.

[Mark Zuckerberg]

An old way of saying [thank you]; often associated with the [Deep South] and/or the [Bible Belt], or the stinking rich