I would have to agree with that. Sell prints.
You know what will happen. Senior Sally will snap a photo with her phone post it on facebook, and provided that it's not THAT blurry, there's your logo.
Or worse, they take that crude duplicate and print it off at wal-mart.
You can complain all you want about copyright violation. You can sue Senior Sally's parents, and no matter if you're within your legal rights or not, they're going to tell all their friends what a greedy, sue-happy nutjob you are. Even if you don't need to get that far, it's not going to go over well.
Yeah. It's not fair. And you can cry about it not being fair all you want.
But at the end of the day clients will go to whoever offers the best deal. Yes. Quality is important, but trust me, just because you're old and inflexible and unwilling to adapt to current market conditions does not make you a better photographer.
there are plenty of talented, young photographers out there who are willing to meet this market requirement.
Because ultimately, fairness doesn't matter.