I mentioned this in the April Revenue thread, but I want to expand on it a little.
April 1 and 2 were normal for me, then April 3 saw a 20% drop, then April 4 saw an additional 30% drop! I gained about 10% back over the rest of the week, and that's where I've hovered all month.
One other person (Teddycore) mentioned the exact same experience, so I think something happened specifically on those days.
Did anyone else experience this major drop on April 3 and 4th? If so, my big question is, are you using SYNC or ASYNC tags?
Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened.
Now, that's weird, because nothing on the page is ASYNC. Then I realized that, since April 4, my revenue has been pretty much exactly the same as it was before I switched to SYNC.
This makes me suspect that Google may have made a change on their end, forcibly changing all SYNC users to ASYNC whether they like it or not.
So if you're a SYNC user that saw this drop on April 3 or 4th... please post and say so.