User blog comment:The ASL Pirates/When Will the Next SH Join?/@comment-24.235.56.170-20150601152659/@comment-24.235.56.170-20150604034230

I never really thought of it like that. I guess it may be true to Oda considers Jinbe to have already joined, and so his accepting the invite could mean that he's still 10 regardless of whether or not someone from Dressrosa comes aboard.

While that's possible, I doubt that will be the case. After all, Nami actually sailed with the crew and took part in several arcs before leaving. I feel like her leaving and joining again is more like Usopp and Robin leaving on Water 7 though. They may have left, but their numbers didn't change to reflect that. In the same way, Nami was considered to be a part of the crew even though she had tried to leave.

A case could be made either way, so I guess we'll just have to wait and see.