I was testing a few banner campaigns (300x100) on TF to bring some dating for lonely folks in Germany and.. it fucked up.
Well, the overall performance of traffic was aweful: low CTR on landers, low CR on offers despite the fact that it was run on a solid funnel (at least, I think so
).
So I tried to dig more into stats in order to find some patterns related to bot/vpn traffic or bad segments to exclude and nothing! the traffic just bad in all terms.
Below you can see some stats of TF (dropdown by ISP) in comparison to other network. Now you can feel my pain

Both campaigns had similar offers and landers.
WTF is going on with DEU traffic here? Is it full of bots/vpn/angry jerkers who like to burn someones ad spend and there's nothing I can do about it or it's my funnel just broken?
What do you think guys? Maybe someone with more experience can chime in and explain it