Scaling Dr.Cash Nutra Offers

currently running several dr.cash nutra offers, primarily weight loss and male enhancement in tier-2/3 geos. seeing decent initial roi but hitting a scaling ceiling around $500/day profit. the specific issue is sustaining conversion rates when pushing past current traffic volumes. it seems like our pre-landers and angles are burning out quickly in certain regions, or maybe the offer caps are just too low for aggressive scaling. we're seeing cr drop from 1:30 to 1:60 when scaling from 1k to 3k daily clicks, this just kills our margins. we've rigorously a/b tested numerous pre-landers (native-style articles, advertorials, quizzes) and main landers. experimented with different traffic sources (pop, push, native) and targeting parameters (device, os, carrier). tried splitting campaigns by micro-geos and even time-of-day optimization. our tracking is robust, using redtrack with custom conversions. however, each attempt to scale beyond the current threshold leads to a significant dip in epi and overall roi. i'm suspecting it's either an issue with the offer itself (too saturated for larger volumes?), an advanced pre-lander optimization technique we're missing for these specific dr.cash nutra offers, or perhaps a more nuanced approach to audience segmentation that we haven't cracked. are there specific psychological triggers or cultural nuances we're overlooking for these products in regions like latam or sea? really looking for insights from anyone who's successfully scaled dr.cash nutra offers past the $1k-$2k daily profit mark. what advanced strategies or tools did you employ? any specific pre-lander frameworks for high-volume nutra? or is it simply about finding fresh offers constantly? thanks in advance!