It not really personal like that, I believe. It's just that if these place don't stay under the radar (UTR) they won't be around for long. There are ways to find out, but it takes a bit of effort and time on your part. In fact, I'm still trying to find out how to get into 1f after all these years on UG, but have given up on being bitter towards those who are in the know. They are just making sure their good thing stays that way.