If I only wrote for sources, there wouldn't be enough subscribers to cover my salary. And the revenue from advertising is secondary to subscribers. In other words, the more subscribers, the more money advertisers will pay per square inch. I've never had an advertiser threaten to pull advertising because of editorial content, but if they did, I'd just say, fine, I'll sell the ad space to someone else. And that's just common sense. You keep up your subscriber base first and foremost. You monetize eyeballs, and the more eyeballs, the more money.