Here is part of an article - It's NOT my words ,I just copy/pasted)
there is problem on processing sales
(UL/Nitro/RG/TB...)
Some say ,it's sabotage in code level , done by google
others refer to google's adsence change policy
check the change in youtube's adsence policy , published yesterday by google
youtube , the biggest source of adsence-revenue for users announced the huge change in rules
experts say ,it directly affected hosts too (and explained how it did it)
it started 3 days ago
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I just hope hosts can find solution
many giant ppd already stopped their affiliates