With respect, I disagree.
Agreed 98% of SC Voters oblivious of Xposts.
But True Believer do pay attention to Xposts.
The Changers of Hearts & Mines:
The Campaign Worker, The Door Knocker, The Local Influencer, The Local Pooh Bahs:
They read Xpost fanatically.
They get motivated.
They ARE The Grass Roots.