One small note, no one really cares about Leonel Manzano. Nike does do a bit of charity work giving runners small contracts so they can live and train, but the guys they really want are the ones who create all the buzz. Normally, buzz is created with a few AMAZING performances for short-term folks (Kerron Clement, LaShawn Merritt), or a consistent record with long-term success (Daniel Lincoln, Alistair Cragg).
They are not paying Lebron 90 million because his scorecard displays 25 pts 7 reb 7 asst per night, they are paying him for the attention he commands. Marketing ability. If Michael Jordan was doing push ups at the local HS track, he would attract a crowd. That's what it is about. On the U.S. track level, when Alan Webb (esp. in HS) or Bob Kennedy (in his prime) appear, it is a pretty big deal. Runners love those guys.
With that said, Leonel could snag a contract, but he will not be demanding anything.
Quick, what are Leonel's best 400/800/3000? Without being a Longhorn or looking them up, you wouldn't know. But you would know Dathan's 1500/3000/5000/10,000 and Webb's 400/800/1500/mile/HS mile/ HS 1500/ HS 2-mile etc. most likely.
Leonel would still be charity work, or a risky investment - just in case he ever did make it big and command attention, Nike will have already snagged him.
Lastly, even with his 6th place finish, Lukezic would probably get the most money of the 1500m field. He has the most star power currently.