Jochem Huhmann wrote:

Back in the Tito (or Shuttleworth, I don't remember which) days it was
said that the 20 millions would pay not only for one, but for two
complete launches. So $10,000,000 might be what a Soyuz launch actually
costs and the Russians may just turn a fair profit out of every tourist
launched.
If that figure has any merit at all, I suspect it is a result of
someone confusing the cost of a Soyuz launch vehicle with the cost of a
complete Soyuz spacecraft mission.