The longest chain is what the majority of the network chooses.
If the majority of the network will be on XT or anything else that support BIP101 (or others), than it will be the chain, it will be "the Bitcoin".
We have to see what will happen when the 1MB limit will be reached...
XT isint happening. There's already too much hashpower put toward not accepting XT. So unless XT supporter suddenly buy 75% up from 1% of the total network's hashrate. Its not happening.
This blacklist score being an ip list uploaded by the dev is so shady, there's just no way actual volume of people will support it. Ever.