Hi, PtaQ here, Community manager for BAR. The idea behind the monetisation is to sell what has been built through the publishing funds. Everything available today and a lot more content will be released for free too and always available.
Basically, the paid content will boil down to a single-player campaign.
The funds help us finish and release the game which still needs a lot of focused effort which is not something you can reliably sustained without commissioning some of that work.
The post below explains it in detail.
https://www.beyondallreason.info/news/beyond-all-reason-and-...