What countries can join this platform? Also I'm interested what methods team uses, KYC, etc.?
The restricted countries can be found on the disclaimer (at
https://centive.org)
You are not eligible to purchase any Centive tokens if you are a citizen, resident or located in the United States including American Samoa, Guam, Northern Mariana Islands, Puerto Rico, U.S. Virgin Islands, or any entity organized or incorporated under the laws of the United States, DPRK, Ethiopia, Iran, Iraq, Syria, Tunisia, Afghanistan, Yemen, the Cayman Islands, or to any other state, country or other jurisdiction in which it is impermissible or restricted to offer, distribute, purchase, sell or retain Centive tokens.