And doctors make most of their revenue from sick people! Makers of cheap food make most of their revenue from poor hungry people! Makers of cheap cars make most of their revenue from low-income people just trying to get to work!
The level of ignorance in Google's statement is breathtaking, reflecting the mistaken view that selling goods and services to poor people is a bad thing. Bail bondsmen provide a valuable service: they allow people for whom bail is required, because a judge deems them a risk for not showing up at trial, to be released and keep going to work.
If bail bonds are being disproportionately required for people in low-income and minority communities, that's the government's fault. Targeting the bail bondsmen doesn't fix that problem--if those people can't make bail, they'll just stay in jail and potentially lose their jobs. Indeed, preventing them from advertising makes the problem worse, because it reduces competition in the market that would drive interest rates down.