Has anyone ever become rich from telling the truth?
Most rich people became wealthy by telling the truth.
In order to get rich, you have to profit, and spend less than you earn. To profit legally, you have to sell goods and/or services to customers honestly – Fraud and False Advertising (lying in these commercial contexts) is against the law. Quite aside from that, if you become known as a liar about the things you sell, no one will buy from you.