Good point. Even the SSPX had missions with Mass once or twice a month, but it was the same Sundays every month (1st Sunday, or 1st & 3rd Sundays, etc.) so people could plan. Everything was organized.
So it's actually much worse than a once-every-6-weeks schedule. It's erratic, which is absolutely, positively inimical to growing any kind of group. The first requirement for growth is stability.
And as much as I hate to hand this information on a silver platter to the enemies of the Resistance, word on the street is that many of the Boston, KY-serviced locations aren't doing so well. They aren't growing, and they aren't even holding their numbers.
But the problem isn't with the Resistance, it's with the Boston, KY operation, in particular the head of that operation.