Perhaps your marketing efforts are directed in the wrong place. You are trying to convince digital agencies that they will be able to convince their customers of the value of accessibility. This sort of second order education is hard to pull off.
You might have more luck trying to raise awareness among businesses directly. If businesses start asking their agency/developer about accessibility, you'll probably see better uptake rates.
You might have more luck trying to raise awareness among businesses directly. If businesses start asking their agency/developer about accessibility, you'll probably see better uptake rates.