I've had a somewhat similar experience: I've been using Adwords for about 4 years and seen its cost skyrocket over the period from about 16 months ago to about

I've had a somewhat similar experience: I've been using Adwords for about 4 years and seen its cost skyrocket over the period from about 16 months ago to about 11 months ago. I was running ads of about Eur 130 per month, and let my costs increase to over Eur 200 per month, to dramatically declining response quality. I reworked my whole advertising strategy, and have cut my spend on Adwords to about Eur 40 per month, on just the most proven keywords for top positions.