[arkitaip]

It would be more profitable and professional to increase prices.

[imwillofficial]

Some people have a price in mind that they feel their work is valued at, and see that as ethical.

When I got my tattoo, the artist refused to accept more than His agreed to price, as an example.

[tomcam]

If you'd ever done A/B testing before you probably would not make this statement. Also, it's quite possible they prefer to stay small and don't want more business.

[bsedlm]

surprisingly (to some, specially hardcore capitalists) some people do not want it all.

i.e. some of us reject the (roughly summed up as) "go big or go home" attitude

[waynesonfire]

once you get too greedy it can introduce competition.