What I'm saying is that being an 'All-American', which Jake has a good chance of being if he stays, will command a higher salary because some European club will be able to try and sell tickets by saying, "Hey, we have an All-American'. It's something that he'll be able to carry around with him for a very, very long time.
European teams want to sell tickets. They sell tickets by bringing in players of interest. Being an All-American makes you a player of interest.
That's my argument and why I say it's better for his long-term earning potential if he stays.
You're really reaching here. Jake was 3rd team AA this season. Not that it matters, I highly doubt Euro teams are signing American players based on whether they were 1st or 3rd team AA (or marketing them as such). Maybe you have a better handle on their season ticket advertising strategies then I do. You must not have a great handle on earning potential though. To earn more money over the course of his career by staying he would have to sign contracts that would make up for loosing one prime season of his career. Give him an 8 season pro career and he'd have to make an average of more then 12% more per season then if he left now. Again, the ONLY way that happens is if he signs a second NBA contract. Lot's of things have to go really well for Jake next season for him staying not to cost him money in the long run. Hope he stays though. I'm selfish, but willing to admit my reasons for wanting him back are based on what is best for KSU (and as a result, me), not him.
Maybe I am reaching, but you're making an assumption on how much he'd make next year when you calculate the 12%.
Here's how I see it play out in two scenarios: leave early vs. come back
Leave Early: Minimal chance at the NBA, immediately go overseas to Europe. Average salary? Unknown. Probably at least 100K. I highly doubt someone would be willing to give him more than 250K, but hey, he might have a good agent.
Stay Another Year: Probably have a really good season. End with All-Conference/All-American honors (AP All-American; not Sporting News). Shot at being a finalist for all meaningful awards (Wooden, Naismith, etc.). All-time scoring leader at KSU with 2000+ points. Most likely will lead his team to it's first conference title in over 30 years. Leads one of a handful of teams with a realistic shot of winning a title. Heavy press all season long. Most likely shifts over to the true point and proves his worth in the position he'll most likely play professionally.
Now, if I'm his agent, and I'm negotiating a contract, and the team, NBA or European, is fighting to keep the costs down, what position would you rather be in?
If Jake has someone out there telling him he can make $500K in Europe next year, and it actually happens, fine. So be it. I'm not turning down $500K. I may not even turn down $200K. However, kids that leave early for that kind of money usually do so because their family needs it (his doesn't), they struggle with school (he doesn't), or they just don't like being in school (I have no idea).
But, if I'm Jake, and I'm obviously not, I'd rather have my year of glory on ESPN and take a realistic shot at the NBA before I sign up to go live in Europe for the next 10-15 years of my life. Maybe I'm projecting on him, but if he intentionally left early to go make a few hundred thousand dollars in Europe one extra year of his life, he'd be a pioneer. Because there is no way, right now, that this kid is getting a guaranteed contract as a 6' shooting guard in the NBA. It isn't happening.