Elon Musk‘s Tesla Inc. (NASDAQ:TSLA) is facing a significant challenge in the uptake of its Full Self-Driving technology, with only 2% of free trial users opting for the subscription. This has raised concerns about the future of the technology. What Happened: Gary Black of Future Fund took to social media platform X, to express his concerns about the low subscription rate of Tesla’s FSD service. He cited data from Yipit, a credit card data provider, which showed that only 2% of the Tesla owners who received a free 30-day trial of the FSD service actually subscribed to it after the trial period…