At the contrary, you shouldn't be surprised at all. OP is clearly looking for referrals by sharing this list. He knows he will get only few of them, if any, if he will share a list of casinos that we are already familiar with and most of us are registered on them. This is why he chose a list of casinos that we never heard of before. I can't recall but I think I explained this in an earlier reply.
However, you are right about being skeptical since not even a single member recognized any of them despite some of them have been operating for more than twenty years (as he claims)!