SoFi has done a fantastic job of growing, and investors have been rewarded.SoFi (SOFI 7.12%) has been one of the best-performing stocks in the financial sector recently. Over the past year, shares of the banking disruptor have roughly tripled, and a quick glance at SoFi's latest results show us why.For one thing, not only has SoFi's membership base more than tripled since the end of 2021, but the company added 846,000 in the latest quarter -- its highest ever.Revenue growth came in at 44% year over year, So ...