If most of the income is from overseas..they will have a hard time keeping that going once the TV series runs it's course. Overseas fans are more fickle and will just jump on the next new thing.. to be honest the football documentary has had it's peak now I think.
I don't get this American thing to be fair. Even the Argyle lot, when seeing the video is a bit strange. Not saying it's 'wrong' just so very strange.