One. There are many drivers in the field who are former F1 stars, several of which generate tens (if not hundreds of thousands) of online followers.
While FanBoost has its detractors, it has also been supported and embraced by many in this new era of Motorsport; which now holds many grey areas and unknowns. The idea and technology obviously has the support of the FIA and through their experience in the governance of global Motorsport and the body sees no reason to believe that the use of such technology is not unsporting.
Should anyone, teams and/or drivers alike have the right to choose whether or not to use under any circumstance other than safety concerns?
While we sit and ponder why FanBoost wasn't used, I'll sit and fan the flames behind the idea that drivers just weren't interested...
Opinion