Because one person or company that is bound to lose millions of dollars, or their entire business model (deceptive advertising and marketing, for one) has more

Because one person or company that is bound to lose millions of dollars, or their entire business model (deceptive advertising and marketing, for one) has more of an incentive to lobby against a regulation than a million unorganized people that might lose 25 or 30 dollars over signing up for a difficult to cancel "membership".