Yes- mobile is a disaster. I can't imagine anybody profitably advertising on mobile. I've asked this group before and basically nobody has ever deliberately clicked a mobile ad (one guy said he did once, iirc). I have a hunch that the people making money off of these ads know this, too. It might be good for branding, but in that case you should only consider CPM-- CPC is your enemy here.

As I gear up for an advertising campaign, I'm looking pretty closely at channels.