According to news regarding Shincheonji in Choi Min-hee's constituency

According to Choi Min-hee's post
Shincheonji party members in her constituency can only be viewed by the local committee chair
In other words, regarding the number of Shincheonji party members in Choi Min-hee's constituency,
it means there are only as many party members as would be expected based on the population-to-believer ratio
If so, what about other constituencies, such as Rep. Kim Moon-soo's Suncheon constituency,
or Rep. Kang Deuk-gu's constituency?
Why do you think there might be many?