Apparently the 46,000 + churches of the SBC are sending a total of fewer than 10,000 messengers (representatives) to the national convention. Each church can send a total of up to twelve messengers based on various factors. What does this mean?
Given that this meeting selects the SBC President, and given that the same person makes some huge appointments that will determine the future course of the association, theologically and practically speaking, I think this is a huge danger sign for the SBC. You can't reasonably accommodate over 100,000 representatives anywhere outside the mega-cities, and sending the full quota of representatives will be impossible for most churches to begin with.
It would seem that the SBC would be wise to, with a supermajority of pastors/churches signing on, decide some things cannot be changed except by a 75% supermajority, and that a lot of these things cannot be decided in an annual meeting that only a small portion of churches can attend. Otherwise, the SBC is signing up for political games by a small minority.