Traffic Dropped due to changing server location ?

[eniac]

Hello,

Our server hosted in canada until June, then we moved website to another server in Germany.
In this movement, there were no bad things, no drop in visitors etc.
Between June and August 16, number of visitors increased over time. ( 1.250 unique/day)

On August 16, we moved our server to vps.net hosting ( in Salt Lake City) and then to Chicago
After this move, our visitors decreased dramatically( 600 visitors/day ). I think our backlinks became meaningless etc.
Also our adsense revenue decreased by 3 times.

we backed to Germany host, bu no luck
Then I moved it in UK hosting. ( supposed to be good since it is in eu )
But nothing changed

We returned back to our Germany hosting again. But # of visitors/3
My adsense CTR and total revenue also decreased by %70-80


What do you think about all of these? what do you suggest us? My website's visitors are coming mainly from search engines ( over %90 google searches )

[leadegroot]

Normally a hosting move will not affect crawling and indexing.
There is a rare exception where there is an actual problem with the hosting, but this is easy to diagnose, as there will be no bot crawls in the access logs (harder to fix, though)
As you have moved hosting so many times, I don't think that would be the issue - I would say that you have been hit by some unrelated penalty or general algorithmic issue that just happened to hit when you moved hosting.
Look within the site.