If a company wants first pick of everything that someone produces and wants the right to monetize it and modify it regardless of the creator's wishes (for example, by inserting ads), then they should at least pay a salary in addition to a cut of the ad revenue. If they're not paying for those rights with a salary or recurring retainer, then the terms as described are plain exploitation designed to intentionally screw the artist.
Also, 5 years is far too long for a contract like that. That gives someone else control of half a decade of your career. If you're just starting out and have a 40 year career ahead, that's 1/8th. If you're older, that could be 1/4 or more.
Also, 5 years is far too long for a contract like that. That gives someone else control of half a decade of your career. If you're just starting out and have a 40 year career ahead, that's 1/8th. If you're older, that could be 1/4 or more.