Regarding Samoa Joe leaving TNA, word is that the two sides negotiated and tried to come to terms on a new deal up until the end and things remained friendly between Joe and the company. The situation was described as similar to the one that led to AJ Styles leaving in 2013 where TNA was not going to be able to match what Joe had been making. TNA made their final offer and left things up to Joe.
When he decided to leave, TNA officials made it clear to Joe that there was no heat on him and that the door would be open for a future return.
Another lesser factor that had to do with Joe's departure is the company looking to invest more in newer talents coming in.
CREDIT / SOURCE - PWInsider