The Internet is the main tool marketers use to sell fraudulent products.

I wouldn't say it's the main tool.

Explanation:

Marketers still use, magazines, newspapers, commercials, ads, and mail to promote their products. And there are plenty of in-person stores for marketers to sell their products.

The internet may be vast and very popular, but it isn't the number one thing to use in today's world (for now).

If its a True/False question then the answer is True.