What would you do? Ignore the anti-Bitcoin articles.Keep donating and subscribing as long as they provide valuable content in the other areas of your interest. Stop donating and subscribing to discourage their anti-Bitcoin stance after expressing your concerns to the editors, but they choose not reconsider their approach?
But then, it depends on how valuable you find the information you're getting from them, you could decide to continue gulping their information and stop making any donation to them since their is an element of propaganda in their content. And in the event that their information becomes a problem to the society, you don't want to be recognized as one that sponsored a false media that paint a wrong and deceptive narrative to people that could jeopardize their decision making process as it concerns Bitcoin investment.