@HelloProject I am stupid keen on people being able to add 'I had a neat idea!' project areas to the grid. Doesn't have to be their business or something they maintain. Just 'I had a neat idea for a business I'd like to build where my character just hangs out sometimes' or 'it would be neat if there was a secret cave in <place>!' if they want to do it.
I think it would be very cool if people did build things like the business example to list on the wiki for people to 'claim' and so on; 'keep and run it', 'donate to game-owned grid', 'make claimable' as options, essentially. Would be neat. I know I've had, and known plenty of people who have had, highly cool ideas for businesses or areas of a grid that would be unique and interesting, but they don't feel like jumping through the hoops to make a character to run it (especially if they'd just want to be a customer there, or have a place they don't own but where they hang out, etc.) or meeting whatever the IC financial standards are for the build, etc.
Temp rooms get used for this kind of thing a lot, which is handy, sure, but sometimes the locations described would be quite useful or cool, and I'd love to see as permanent additions to the grid. Provided your core of grid rooms is sane, I really see very little harm in this. I 'grew up on' sprawling, immense grids, and always found them interesting. So long as sensible navigation is possible, people adding a park or a cave or a strange hidden garden or a secluded beach or whatever is something I think should be encouraged.