Looking at blog.zoho.com and zoho.com/blog, as well as zoho.com/academy — it appears all these sites are Wordpress sites! So, my question: why does Zoho not use its own product, Zoho Sites, for their blogs?

Related question: are there any business blogs built with Zoho Sites that do well with Google search results and which have significant traffic to them? We would love to use Zoho for our blogging requirements but are skeptical about Zoho Sites and its ability to help with SEO, customization, etc.