Just make it closed source (or source-available) and give out no-cost licenses how you see fit. You are the author, you decide what to do with your code. This i

Just make it closed source (or source-available) and give out no-cost licenses how you see fit. You are the author, you decide what to do with your code. This is a well-supported model too, plenty of products are like that. There are plenty of licenses around, lack of alternatives isn't why people use MIT or Apache.