This article is amusing:
CosmoCourse CEO Pavel Pushkin told Sputnik New Agency, he came up with the idea of suborbital tourism back in 2013 when he was working at Khrunichev State Research and Production Space Center.
“We were reviewing various concepts of commercial space rockets and came up with the idea of launching people into space via suborbital trajectory.”
Wow, as far back as 2013! What a visionary.
Note that it’s short on details.