The sad thing is that being an artist was already a very hard career choice, even before all of this. It was a real struggle. But, now... it actually managed to get worst.
I don't think there's one platform better than another, you end up lost in the sea of amateur, hobbyist and professionals. Like we say here "C'est toute mix-mélanger!". 
Personally, the best social platform, is the face to face one. I've been a vendor at conventions, festivals, expos for 15 years. It's my golden ticket. The human interaction, even if it's more localized and the numbers are smaller. They last a much longer time.
I don't have the numbers online, I have them out there.
I was begged for years to open an Etsy shop to sell my stuff. I took the time to finally to get it done and it took forever! I spent so much of my time getting it ready. I promoted it online like crazy, even paid for digital advertising. In 3 years, I had 0 sales.
Same product, 1 day festival outdoors (It was a VERY VERY cold day) .... I almost sold out of everything. My comic does very well outside the web, but it just gets lost on social media.
Keep in mind, that I'm well aware of human interactions with COVID, I'm booked for 2 conventions in 2021, and they'll probably get cancelled again.