Making extra cash as a philosopher?

In our March "how can we help you?" thread, a reader asks:

Any advice on making some extra cash as a philosopher (generally, or even in the UK in particular)? I have a decent permanent job that allows me to live comfortably and save a little. But I don't really make enough to also put money toward my student loans, which I would like to do. I'm wondering if anyone has advice on how to make some money in the short term as a philosopher. I don't think there is an option to teach summer courses at my university. Any tips?

Hmm...good question! One option is to try to publish some public philosophy, as I know that many venues compensate authors. Then again, publishing public-facing work is tough and I'm not sure it tends to be terribly well compensated. Aside from this, I'm not sure. It's always possible to pursue various 'side-hustles' (e.g., bartending, driving for Lyft, etc.), but the OP seems to be looking for ways to make extra cash as a philosopher. In any case, it would be great to hear from readers. 

Have you pursued ways to make extra cash, either as a philosopher or as a side-hustle? Any tips?