OK but this is not exactly risk-free. You are on the hook for the downside risk of whatever you own behind those calls. Selling covered calls comes with a lot of exposure.
It's kind of crazy that your random comment on HN lead me down this path. That's why I'm a reader of HN since 2008 or so – exposure to randomness ;)
Or is that not how it works? I've never written my own options.