The right to anonymous speech is something we hold pretty dear here in the US. It goes back all the way to the anonymous publishing of the Federalist Papers.
In the case of corporate sponsored speech? You bet I do. And "truth" isn't the problem so much as bias. You can state the exact same true fact 50 different ways and spin it to mean almost anything you want.
These are basic things that need to be made obvious.
Buy all the ads you want, it's fine with me. As long as I know you are the one buying the ads.