I wouldn't be surprised that Popp did offer more money based on what Wilder did last season. But if James has a good offer from a NFL team he would want to go right away. Making 400,000 + US is a lot different. Import RB's in the CFL are lucky to make 100,000 Can. I also expect his Father really wants him to play in the NFL as he seemed to be involved in whether James would sign with the Argos in the first place.
We also have to remember the new contract with the CFLPA is coming up next year. That could be a factor in the impasse as well.

This is disappointing to say the least, but the Argos will have to move on and look for a replacement. Something like this happens every year. Somebody good retires for some reason or other. Could open the door for Messam but they won't get him for 56,000 that's for sure.