They should do the UBI system but also have a subscription service where you have to hold a certain usd amount of Musicoin in your account to play music.
And those coins get burned at end of each month.
Say it cost $5 worth of Musicoin a month, you have to keep it topped up as each month those $5 worth are burned (decreasing the supply).

Free music would create much larger traffic, just need an idea that will make Musicoin valuable otherwise its worthless to miners and the musicians.