So it would be a massive sports washing exercise, although I don't see how it will "wash" anything as any player who joins this league will be a pariah.
The franchise choices are bizarre. Only Cape Town, Tokyo and London are in established rugby markets. They will be playing in empty stadiums in front of a non-existent tv audience.
For the other reasons you say, only someone who wants to lose an absolute boat load of money would ever "invest" in this.
I have South African family and they always highlight to me how the Springboks are the one thing that pulls the country together. No South African player will join this, if he wants to play for the Boks, unless Rassie gives it his blessing. I can't see him doing this.
Also I don't see the money being that much better than what is on offer in France. So I don't see any French players going for it.
Japan Top League already pays massive salaries, so why would Japanese players go for it.
I don't see it ever happening.
If by some miracle is does, it will last less than a season and the players could end up stranded in a foreign country having to fund their own way home. They will then struggle to get teams to take them on as they will be seen as pariahs.