Lending fintech SoLo Funds is embroiled in a class-action lawsuit that alleges deceptive practices regarding loan fees. The lawsuit claims the company falsely advertised zero interest fees while promoting 'tip fees' and 'donation fees' that increase borrowing costs. Previous lawsuits from Connecticut, California, and the CFPB have also targeted SoLo Funds for similar issues, including the use of 'digital dark patterns' to mislead consumers. The company has raised over $13 million from investors, including Serena Williams, but has not commented on the latest allegations.