cindy's team discusses all of those things (keyword research, google and etsy differences, social media for SEO, etc.) for free.
There are, from what I can see, two areas of weakness in Etsy sellers regarding SEO:
1. They don't understand (as their main focus/interest/skill is the art or craft instead of the business) how SEO works, even after reading threads like cindy's or others that are free to use. If you can explain things to them in even simpler terms than the available resources here, you might be of some help. I don't know how it can be made much simpler, though - it's a complicated topic!
2. They are unwilling to do the work necessary to establish good SEO. It doesn't matter whose advice you read if you won't do the keyword research necessary, or read through the recommended best practices, or analyze your stats carefully. It is as much work as the actual production of items and then some!
Also, maybe you're new to this team? But promos, even disguised ones, are not allowed. Disguised ones may pass by, but they're generally considered a bit gauche.