I suppose in theory people only have so much to spend but on the other hand growing the economy grows that disposable income.

What I found was indirect competitors with deep VC funded pockets were bidding rates high enough that it wasn't viable for me. I say indirect as they didn't compete against my product but did bid on the same keywords.

I wonder if there is some upper limit on how much advertisers can extract from the economy before they start to weaken it.