I am still thinking this is a bad idea.
Before you came up with this idea then all members were equal and they would contribute on a function of interest and time. That interest is what lead to valuable content and honesty.
After this idea you have made 3 members artificially selected. Those 3 members I value their input. They have been exceptionally good valued community members creating high quality inputs. No issues with the 3 you choose. I have issue with the idea of a number, e.g. 3.
I do not think you should add new star contributors because at times many individuals offer smaller quantity high quality valuable content so you would always have someone left out. If you were to add 2 or 3 to make total 5 or 6, I'd always be able to think of a few more who I valued their input. Plenty of those mentioned in the nomination thread.
So the whole idea of a limited set of preferentially accessed community members always makes an artificial barrier.
I think better you drop the Star Contributors idea. I know you disagree.
If you try to make a few special you end up making everyone else not care and then
The role of a moderator is special, however, they have to invest a special focus which is an effort, and you should reward them appropriately, not for content but for effort. Gifts to their efforts I would applaud, because a moderator is a special community role deserving of special reward, but I would recommend that done quietly to the side not visible within the community.