There are a few well-published occasions where a "pay what you want strategy" has worked very well. In music, artists have offered their product for download in return for a payment of the customers choice. Having customers pay for downloaded music, or not, works because the cost of a download is virtually nill, and anything an artist may receive for an album or a song is better than what they would receive if it is pirated and better than the minuscule compensation they receive from the music streaming sites. But for artists, there is another variable, the network effect. As an artist, you would want people to listen to your music, to talk about you, to talk about your music. For your band or you personally to become a brand. To use the brand value to drive visitors to the concerts and shows. So a "pay what you want" model for an artist has little to do with making profits on the thing you sell.