I did, but it wasn't easy. I had tripled subscribership to my website and weekly newsletter in the course of a single year, and it was time increase the rates on advertising space. My clients were all small-business owners operating on very limited marketing budget. While they understood that the rate hike reflected greater reach for their ads, a few chose not to renew their contracts. Thankfully their places were eventually taken by larger, higher-profile clients who wanted to associate themselves with my growing platform. There were a couple lean months in there, but it was worth it over the long term. Ask for what your products and services are worth - others will respect your decision.