I just checked the marketplace stats, and with 59 mods purchased to date, I think I can have a word about this decision:
For me, the marketplace was a great way to:
See what new addons have been released and decide if I should install them on the community I manage.
Keep up with the updates and install when one is available.
These things will no longer be possible without the marketplace, and I will have to check ten different dev sites, install updates manually, etc. A major drawback for me.
I don't have access to financials, but from your latest actions, I see that you want to focus on the enterprise customers that take a cloud-managed plan because that's where the money is. And also, enterprise customers only install a few add-ons.