For anyone interested here's my story and why it's not us, and Adsense must be totally screwed up. I get around 3000 unique visitors to my website each day, this has been consistent over the past 7 years or so, AND IMPORTANTLY remains still the same, traffic is good, no problem here.
For the past 7 years I have been earning on avg £10 - £30 a day with Adsense, sometimes with traffic spikes up to £60, but on avg £10 - £30. This all changed from January 2016, my earnings dropped to around £5 a day, I thought OK, at least it's not traffic related, must be advertisers not spending, and things will pick up again. February dropped to around £3 a day, same as above, traffic to site strong.
March it dropped to around £1 - £2 a day, and some days I experienced for the first time in years no actual clicks!
Throughout all this I have made no changes to my ads, and traffic is good so I think something is seriously broken.
I got my last payment this month and have now removed all adsense ads until I find out what has happened.
Something must be wrong, and I have no idea what it is, so happy I found this place. Will keep an eye out to see if something changes in future, but I am not giving Google advertising space when I am clearly being cheated.
I also find it suspicious that they post a dodgy article on what to do if your earnings are low at this time. All the usual #*$! about seasonal etc, we know how our earnings work, they must think we are all stupid.
I also know about the changes they made to Adwords on their results pages, but that is not going to do this to Adsense in such a sudden way. I am still seeing top companies in my results who have been advertising on my sites for years, so nothing on the outside appears to have changed apart from the revenue, and numbers of clicks seem really really dodgy.