Actually there are quite a few channels not listed on Lyngsat , and I have already seen updates that are already gone before listing on Lyngsat, just check Amazonas, some of those channels last a couple of days and are replaced by another channel, example Setanta Sports lasted less than a week and already replaced.
The question is do you make a name for yourself by contributing to Lyngsat knowing that the information provided could put a FTA channel in jeopardy.