Questions?

I'd like to make custom quizzes for websites and in return, they would give me mention or link to help promote my website.

With the "Essentials" plan I can create unlimited. So, I could create and then help them embed, for example, on their WordPress website?

I think you guys could make it more clear about the importance of where the content "lives" and why that even matters. If it is an embed, I don't have to link to that sub-domain you create for me, correct? I can also take out my branding so it's just a piece for their website? And the only "external link" is to your page from your logo?