Rules for future node elections have not been released by dev team afaik. Best for the devs to work on the software and network stability now, let things settle down after the launch, then I'm sure details for future elections will be made public.
One thing for certain though, many more candidates will run next time, notary nodes are in the words of j777 'money printing machines' at a price just higher than where we are today
Forgive noobie question, but why you say 'money printing machines'?
Because they get to mine most of the new coins .....while the rest of the world gets to mine the left overs
Cheers Jon
But still majority of the new coins goes to the investors via the 5 % APR feature
https://supernet.org/en/resources/articles/receive-free-coins-quaranteed-kmd-interest