Note that neither backblaze nor godaddy own the domain. BackBlaze has a tranferable lease with renewal rights and godaddy is a middleman. What godaddy did is

Note that neither backblaze nor godaddy own the domain. BackBlaze has a tranferable lease with renewal rights and godaddy is a middleman. What godaddy did is very wrong, but it's not stealing. More like breach of contract, failure to provide service or similar.