I think you are thinking of Forbes opinion articles, which anyone can submit for. Forbes, like Business Insider, has no paywall and seems to have a low quality

I think you are thinking of Forbes opinion articles, which anyone can submit for. Forbes, like Business Insider, has no paywall and seems to have a low quality threshold. Fortune is still paywalled at over $200 per year after the trial year, while at Forbes an annual subscription is $50 for less ads. If you want to submit an article to Fortune you have to send a pitch to an editor.