Quick things to check:
1: What does your webmaster tools say about your impressions/clicks ? I know you said the clicks on still there so i'm assuming that these are your amazon link clicks but it is good to check how you are fairing on wmt to take bot clicks out of equation
Well, according to analytics, my traffic is nearly identical to the previous period, its up over all by around 20%, but its the same kind of traffic. I dont know why amazon would show so many more clicks then the last period, with only 20% more traffic.... Something isn't right there...
As for bots, google bots are excluded, and traffic from other bots is minimal.
2: Assuming your Amazon account is not banned (if you were u cant miss a massive red statement on your amazon account page), what usually was your epc?
Nope, my account is not banned. My sites all rank naturally, and are within amazons affiliate TOS.
With my usual epc, I should have some $$ by now...
3: Have you checked historic trends for the same month last year? is it seasonal?
It's not seasonal, this product stays relatively stable all year round, not fluctuating more then 30%.
4: Has there been just drop in sales, if so although coming down to 0 is very extreme, have you not had any cookie based sales at all?
Thats correct, NO sales whatsoever in July so far... Thats after selling a few products every day for the last many months before.
5: How does clicks compare when you do trend report for last 7 or 30 days?
Clicks WAY up in July, I'd say 5X higher then normal. I normally have a very small amount of highly targeted traffic, that gets a great conversion rate.
6:Have you clicked on your own link and checked if the product is still on market?
There is no issue with the links, I have a module in WP that reports any dead links, and I have manually checked a selection of my more popular links, and there are no issues.
7: how does your competitor look in the competitor analysis tools like semrush? has he had the same drop?
The niech I am in actually doesn't currently have any competitor's, sites with the same or similar products that are not affiliate sites, have not seen any kind of drop.
The only thing that changed at all is that I transfered my website over to a new host, nothing else changed. I am assuming that this spike in clicks, and total stop on orders must have been somewhat caused by this change, as it started on the same day....