Conrad, your points are really fuzzy. It almost seems as if you are stirring something up for
a hidden motive. (Are you a secret agent? :)
.Do you have an axe to grind that requires this forum?

I have no objection to your being able to speak here, but I question your motives.

House concerts are generally given by fans and the money goes to the performer.
Any scams would be broadcast among the performers.

Inviting people onstage to sing whatever they want sounds like a foolish idea to me.
I wouldn't pay money to hear that.

I can understand your need for attention but could you please make more sense?