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Hi there, Thanks for the question. I'm afraid that I'm not too familiar with "Hoth" link building so I can't answer that directly. Regarding subdomains though, from a technical perspective, they are different websites and therefore are capable of passing link equity in the same way that any other website could. It really comes down to the quality and relevance of the subdomain. I'd recommend looking at them in the same way you would any other link and assess them for quality. The one thing to maybe flag is when you have lots of subdomains which are on the same root domain. There is a chance that these may not pass as much value but again, it comes down to why they are there and the quality of them. Hope that helps! Paddy