Here are the links for the official posts: https://steemit.com/roadofrich/@ror.pay/5d7cu6 and https://steemit.com/roadofrich/@ror.pay/ror-11
Basically, ROR team announced that players can have up to 12 mercenaries this coming Wednesday. I've asked the ROR team through the Discord App, and they said that having the extension will cost DIA, which is a in-game currency.
Also, the ROR team has a tentative start date for starting the reward pool! The reward pool is starting early November!
I'm looking forward to all the updates for ROR!