If this is intended to increase revenue then it will probably backfire, instead of getting the higher fees they'll get nothing when people stop touring.

My band was invited, but we quickly realised that both the cost and practicalities of getting visas made it impossible.

The US is one of the most unwelcoming countries I've visited from the officialdom point of view, although once there the people couldn't be more friendly. I first went in 1976, Bicentennial Year, which was perhaps the first time the US had promoted itself as a destination. Unfortunately no one seemed to have explained the concept of tourism to the immigration officials, who were very difficult.