Can I use Yola to design websites for my customers?

Does anyone know if I can use yola to design websites for my customers? I'm not so great at html or css, but I excell at graphics placement, the writing portion to catch potential customer's eyes, and SEO, but I can't see where their policy says I can't use their product to make profit by designing sites for people. I know weebly is against it, but I'm not sure about yola.

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