Keep in mind that adopting a new niche doesn't immediately show results. It took my LEGO articles a good three months to start trending. Once that happened, even older LEGO articles started getting discovered and Medium itself promoted one on Twitter and LinkedIn. I have 46 LEGO stories at the moment. Collectively the average results around $15/ LEGO article. Still around 3 times less than what tech articles on average generate, but regardless, quite encouraging and it's trending upwards.