As stated previously in this thread, I think it has more to do with the power struggle between networks. NFL network seems to be tipping the scale and enjoying more access. In Bruce Irvin's interview with Prime, they were both badmouthing ESPN and promoting NFL network. Perhaps it is an issue that is bigger than the average fan knows. With the renegotiation of TV rights and talk of Google getting into the bidding for streaming, I would think NFL network would try to advantage itself in any way possible. ESPN is currently a huge gateway for NFL media but if fans have the option of streaming MNF online, ESPN might be expendable. If I were Goddell, I'd be trying to take over as much influence/ad revenue from ESPN too.
... and here's Lynch as an easy target because the entire League and all the information is less bottle-necked than ever before. Beastmode should only grant interviews to people that can beat him arm wrestling. Air the challenges on RRR and don't grant access to ESPN.