Well, how many Sinners do we think there still are?
If we assume that there were two who had, dare I say, Original Sin, then there is only one Original Sinner left and its recruits. If there was one sinfection per Night, that gives a maximum of 3 recruits (3, right? This is Day 4?). Add one for paul 1’s tracking power causing sinfection, and that gives a total maximum of 5 Sinners.
Every day we have had Sinners claim, and in some cases those people died. Based on the assumption that a Town who embraced Sin would keep it to themselves, there would be only a couple of Sinners.
WAG on my part, but the real number isn’t that far off. Add to this the fact that Sinners need to achiee 100% sinfection, whereas Blackhearts need to control the majority, I’d say the Sinners are far less of a threat.