Nancylee: I know several people who make a full time income on Etsy. The secret is hard, hard, hard work, making the same thing over many times and of course it helps enormously if someone at Etsy's headquarters likes your shop so they feature it in their emails, home page etc.
I know a few people, also, but I don't think there is a magic formula. I do a lot of what my friend tells me to do with jewelry, and she sells a lot. But she's been on etsy for a long time. I also agree that if they like your shop and feature you, you're golden! That seems way too happenstance to me, and not like a business plan - you can really predict what they will like or feature. So I continue to explore other ways, including linking my IG and my FB to my etsy shop. I have a tumblr, but haven't used it yet.