I don't, nor am I aware that they have mentioned it. But the reverse split when they were nowhere near maxing out the A/S count would seem to suggest it was done to move the stock price to a more exchange friendly number.
A lot, including much more than uplisting, hinges on their ability to maintain profitability at a reasonable rate. Revenue growth would be nice too, but it's a distant second to profitability IMHO.
They are also completely linked to GNC which does almost all their selling. If there's a falling out, or GNC changes suppliers for the products of FitLife, the show is over.