Google seems to be entangled in its own circle. In an attempt to avoid scams, Google prevents legitimate hardware repair services from advertising over the search engine. Read more at pcmag.com
An open letter was issued by iFixit to the Federal Trade Commission. Google's idea is to basically avoid any kind of activities conducted by scammers.
The third-party repair services seem to be waiting for Google's verification program. Meanwhile, they are still prohibited from posting any ads.