He isn't receiving money 'in secret' You have your facts wrong.

QUOTE: Two sources familiar with the sales arrangement told CNN that the purchaser of the artwork will be kept anonymous and neither Hunter Biden nor the public will have knowledge of who bid on or purchased the work. If there is any unusual behavior -- such as the offer price being too high or the collector doesn't appear interested in the work -- the gallery is expected to turn down the offer, the sources said." [1]

Apparently ALLEGED absence of evidence is all some people need. Again, convenience stores aside there is literally NOTHING HB could do that would not be attacked as profiting from his name. It's been sad history that for millenia people have profited from their famous names. The rest of us don't have that huge step up on success.

What do YOU suggest that HB do to make a living that you would consider correct?

I am not an art appraiser- I know what I like, is all. If someone overpays, that's on them.

[1] https://edition.cnn.com/2021/07/08/politics/hunter-biden-art-work-sale/index.html