Zwift "Premium", TR Merger or Add-In speculation

Eric Min used XERT some time ago, which started some speculation (cf https://www.trainerroad.com/forum/t/zwift-and-xert-merging-buyout/ ) but it just died out in the end. What guarantees us that this time it is sure that Zwift will buyout TR? Just because @dcrainmaker said so? What other concrete information do we have?