I got the same email a couple of weeks ago.
I was upset because they were doing well. Perhaps its their responsibility to keep the surfers I get to trials, I can't do much more than get them there. All my traffic was link list and se too.
Anyway I didnt take the hundreds of links down but I am not doing anymore unless I see that it is still profitable. (ie I will wait and watch for a few months)
PS In hindsight I shouldn't write anything till I have had my second morning coffee |badidea|