The B3 Coin version of a master node is called a Fundamental Node and while it performs much the same function for the B3 network as a master node would, it differs in on main factor, and that is Proof of Disintegration.   In the more usual Proof of Burn methods, coins are only locked away in a wallet ... still existing on the blockchain where at some point in the future, either through malicious intent or error they might be unlocked and released back into circulation.  Proof of Disintegration (PoD) is an innovative method of reducing a coins supply by completely removing coins from the blockchain - they are gone forever.

When you buy a Fundamental Node, the fee (15,000 kB3) is disintegrated.

For more information on the process involved in creating a B3 Coin Fundamental Node, come to the Discord - F Node Help channel and read through the prepared material and ask questions of the B3 Team Technical Support people as well as other helpful community members.

https://discord.gg/z57Bmgx