Why would ads go away just because you pay? Print newspapers and magazines have had ads forever and they cost money. Even expensive glossy magazines like National Geographic have full page ads, half page ads, etc.
There is no natural law that ads will go away. Ads will only disappear if their presence would make the company lose more customers than they gain on ads. Ads make them money. If people don't mind it so much to abandon the service/website, there will be ads. Publications are businesses and want to maximize profits. They don't just want to cover some fixed ongoing costs, like hosting and journalist salaries. As a business they use the available tools to make more profits. There is no "enough" in business.
There is no natural law that ads will go away. Ads will only disappear if their presence would make the company lose more customers than they gain on ads. Ads make them money. If people don't mind it so much to abandon the service/website, there will be ads. Publications are businesses and want to maximize profits. They don't just want to cover some fixed ongoing costs, like hosting and journalist salaries. As a business they use the available tools to make more profits. There is no "enough" in business.