I'm a collaborator on a project that one of my colleagues is the owner of. I purchased tokens to add to the project, not realising that only the owner could do this (and I'm not sure how I was supposed to know that!). So then I was stuck with tokens I couldn't use that we had spent some of our limited grant funding on, and the answers we got to our requests for assistance were basically variations of "computer says no" - i.e., we couldn't transfer ownership to me without shutting down the (actively recruiting) project (which would mean dozens of participants in the larger project that these tests were part of would miss doing these, and also if we did, any unused tokens in the current owner's account would be wasted anyways); I couldn't transfer tokens to the owners account; we couldn't become co-owners both able to add tokens.