The SDK really shines, there are allready 40+ websites where I can download stuff 
And handcrafted scenery is the most beautiful scenery. I would advise Asobo to organize sponsoring of developers. Their own developers by getting more money in, and people in the Community doing occasional work at home.
Vehicles on airports, with certain liveries… Company logos could be integrated via freeware downloads into the FS2020 scenery, on specific locations, where they already exist in the real world… maybe certain sponsors will be eager to let their house style be visible in the FS-world. For the FS-customers a larger volume of freeware scenery is also nice ! bigger chance you can download e.g. your own neighborhood as a handcrafted scenery… suppose the bus company would like to have vehicles and stops like these…
As a developer you may e.g. put trees of the right size, and improve on road and near buildings…
In some cases, logo’s can be added into sceneries. Some companies have landmarks, like
Of course, a high quality standard should be maintained: if you want to put up a ad-banner in FS on a real building, it should be an appropriate, handcrafted building…
The building, preferably with surroundings ! Developers could provide a complete scenery, take part in contests… Asobo would get the sponsor money, developer could get a percentage for every download, or flightsim credits to buy things.