The Temple reports more than seven hundred thousand registered members. The figure was reported in 2023, and it counts free online sign-ups, so it measures the reach of a name rather than the size of a congregation. Active participation is very much smaller and is not published. Both facts should be given together, because neither alone is honest.
It has chapters across the United States and in several other countries, a headquarters and art gallery in Salem, and a legal operation that is the substantial part of what it does.
Two things about it are genuinely novel. The first is that it may be the only new religious movement in living memory whose characteristic ritual act is filing a permit application. The second is that its critics on the religious right and its critics on the secular left make opposite complaints, that it is a real and dangerous religion, and that it is not a religion at all, and it is able to point at the disagreement as evidence for its own case.
Where it stands with the older Satanism is settled and hostile. The Church of Satan regards it as activists borrowing an iconography; the Temple regards the Church as a philosophy without a public purpose. Both are atheistic, and neither worships anything.
What the Temple has demonstrated, whatever one makes of the theatre, is a point that was not obvious before it started: accommodations written for the majority religion are difficult to defend as neutral once somebody unwelcome asks for the same accommodation.