Is there a way to unlock exotic cars in gta online?

The only source provided concerns the video game Scarface: The World Is Yours, which has no connection to GTA Online or its vehicle unlocking mechanics. Because the evidence is unrelated to the question, I cannot confirm whether a method exists to unlock exotic cars in GTA Online. No details about GTA Online features are present in the verified source. If you need accurate information on GTA Online vehicle unlocking, you would need to consult a source that directly addresses that game. Without such evidence, I cannot provide a definitive answer.