Neither halal-approved meat nor kosher-approved lemonade fundamentally change the taste and appearance the consumed product. The only costs to providing those options are an extra non-governmental "tax" in how the food is processed, regulated, and approved, and that cost is much less than the cost of not selling to those will only consume kosher/halal, or providing a second set of approved options to them.

There's no such thing as kosher/halal pork, and no such thing as vegetarian-approved filet mignon steak. People who can will still eat their pork and beef, rather than succumbing to the no-pork, no-meat practices of the minorities.