In a white paper, the Russian company Gazprom is listed. And regarding the size of investment, I think that no one will tell you, since this is a commercial secret. And by the way, bounty is simply gorgeous! Excellent conditions for participating in the promotion of such a mega-prospective project!
GazProm is a very serious company. On the one hand it is very cool that it is declared as an investor, and on the other hand it is a very powerful corporation and in case of project success, we can simply be thrown out of the project as small investors.