Not real chasidim? So...they're Lubavitchers?!?
Well to give you a minimum understanding about the word "satmar"
There is probably 40,000+ families in the world calling themselves satmar
There is probably 15,000 of them that don't affiliate with any satmar and has no rebbe,but they still call themselves satmar
There is 2 rebbes and then a 3rd sect bnei yoel without a rebbe
Then I can found people living in boro park or monsey and even Williamsburg that they call themselves satmar but they are 3rd generation already that didn't step foot to any satmar rebbe since 1979 ,they would do shiduchim with any person that affiliates satmar even a arony or zaly
That's just a glimpse to explain it
But a KJ bucher that learns in KJ to take a girl that learns in KJ zaly school is probably mamesh close to 0, other places it's still a rare occurrence