Once again slim boy you have made some very good and valid points. The Iglasea ni Christo is one such denomination that success has relied upon migration of immigrants. I remember seeing a promo film for the church showing how it was growing internationally and that this was a result of God's blessing. The even showed a jw assembly hall in Spain that the INC had recently purchased. I just thought to myself this ain't got nothing to do with God's blessing but has got more to do with people who come from a deeply religious culture moving to foreign lands. Even the jws in my local area have a Philippine congregation. Something 5 years ago was unheard of.
2018 Service Year Report - Released on jw.org
Near half of their JW "Lands Reporting" had 'decreases' in Memorial Attendance last year (2018)! "58%" of attenders are of the 'non-publishing' group/class :) ! Hopefully, many more of these 'non-publishers' do not attend this year!