People with experience selling on Shopify, Amazon, and eBay, which do you prefer and which do you make more from?

I've personally made the most from Amazon, but it's been the most unstable, since I've had all sorts of issues that have come up from gating, legal, hijackers, that leads to massive swing in sales. Wondering about everyone else and maybe if you're open to share what category or industry you're stores in?