If I change host, or move on later, who owns the domain provided by DH?
you own it
the whois information may not be just as you like it after initial purchase but you can change all that from within the web panel.
if you moved before the money back guarantee period was over and received a refund, the cost of the domain name would come out of that refund, you would not get that back, because you in fact own the domain name for a year and there is no mechanism in place to provide for give backs on domain names.
You also need to keep paying the annual reg. fee if you go elsewhere.
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