I suspect Excel et al. are the absolutely perfect topic to target people at the intersection of 'affluent' and 'overwhelmed'.

If I understand the article correctly, these are one-time charges for lifetime access to the videos she produces.

I'm obviously not the target market, but I really appreciate people that don't gate repeated access to content with monthly subscriptions.

There are a lot of places that offer an education budget of a few hundred dollars. This kind of thing would fit perfectly into that.