I appreciate the hard work that people have and do put into the teases on this website - I also appreciate that it is freely available.

I have created teases in the past, under a different username, some of which are still on the site and some of which are not. I did not feel I was particularly ...

I disagree.
I think it goes against the site's ethos (that of creating and sharing) to make a tease that is invite only.

Remember, the internet is biased towards the sharing of information, because that is what it was designed to do.