i personally haven't seen anything about pinky but i don't tend to follow other forums very closely if at all. while i personally can be fairly confident that his tail kinking was caused by a deficiency when he was young, others unfortunately may not be so trusting or quick to see it that way, especially not knowing you or wendy.

admittedly, his tail looks bad and the indention at the base of his spine very bad. while it probably doesn't affect him in any way it does affect people that don't understand how it happened. there really is no way that you can prove that it isn't genetic--it's basically just your word. i think it may not be wise for you to advertise him as a breeder because of this. you may want to advertise him as a pet only gecko, in order to avoid some of the negative feedback, although people being how they are, you may still get some of the same negativity.