I asked the same question about the SR-71 Blackbird, and I'm also curious about the Perlan II sailplane which travelled above 70,000 ft, and is planned to be flown to 90,000 ft, if it could be used for nearspace tourism and what some issues might be with that. Its starting location would have to be near a high enough mountain range where it can use enough lift to climb that high, and this is best at certain times of the year I guess. A major advantage would be that this form of nearspace tourism would be 100% environmentally friendly (for those who bother).
No, Perlan II can't be used for tourism. It has only two seats, and every description of it talks about the crew of two, or the two pilots, or the chief pilot and co-pilot. Someone who gets certified for the type and carries that much responsibility isn't called a tourist.