My biggest concern would be that items farmed/mined will be allowed to be brought into the live universe.
This sets up a scenario where people pay real money for resources that they control access to.
And regardless of how altruistic some say they would be, it’s just creating a template for the unscrupulous to abuse.
The only way it would be OK to allow mats obtained on a rental world into the live universe, is if there was no restrictions on who can enter that world and gather the mats, but then what would be the point? (I assume those that want private planets would be thinking)
If I was to push my thoughts to the furthest of its pessimism of rental worlds, it sets up a system to allow wanna-be mini dictators to have control over others, for example:
I set up my shop on my private world, and sell stuff really cheap, but you need to ask my permission to be allowed on my planet to buy it, oh, and you better be nice to me or I’ll ban you.
Or I have an amazing spot with tons of glow caps on my planets, I’ll set up a farm, but here are my rules you have to stick to to be allowed on my planet, oh, and you better be nice to me or I’ll ban you.
And so on…
I have to say, that none of us know for sure how rental/private planets are going to work, but the above are worst case scenarios, and are P2W (as in, pay to have a distinct advantage).
I really can’t see a way to do these in a way that does not give a P2W advantage without removing the reasons that people want them!
Guess that’s why I don’t envy a game developers job on Boundless at the moment.