Carlin Isles to Toulon has fallen through, Isles will spend next season with USA 7s. He also has a Nike endorsement deal.
http://rugbymag.com/usa-sevens-men/8406-isles-to-toulon-off.html
...some details of the contract made Isles pull back, and he's since told RUGBYMag that he plans to stick with the USA 7s team full-time for another year.
http://rugbymag.com/usa-sevens-men/8406-isles-to-toulon-off.html