Fractional is a pyramid scheme, where the biz owners really don't own an
aircraft, and they find this out right quick when the company shuts it's doors
and owner is outside looking for 'his plane'.
How wrong can you be, with NJ, you do own a share of a particular aircraft and even have the serial number of that aircraft on your paperwork. The taxman also sees it as ownership and gives you the tax benefits accordingly. IF NJ would ever fold, you and your fellow owners of your aircraft can just fly the thing away.
When it comes to your "shares", your 16th share may well mount up to 24 owners per airframe, I can't comment on that, but it seems highly unlikely that uncle Warren would sink that low.