I hate to break it to you, but the PCA is insignificant; ARP utterly so. The entire world body of the ARP could show up to a minor league baseball game and not attract notice in the local press.
Judging the Presbyterian church by the ARP is like judging Catholicism by the Latin-mass crowd.
We’re not insignificant to God. Relatively small in number we may be but then again doesn’t Scripture teach us that only a relative few will be saved?
“Enter by the narrow gate. For the gate is wide and the way is easy that leads to destruction, and those who enter by it are many. For the gate is narrow and the way is hard that leads to life, and those who find it are few.”(Matthew 7:13-14)