I can only imagine the celebrations from the crowds when your main contender helped you to cross the finish line. That is such a selfless act and demonstrates good sportmanship and is so commendable. Clearly number 337 was not in the race for only the money. Even if he was - he changed his mind and behaviour. You ended your post with
I don't know, but now I am sure.
It is understandable that your initial perspective will be different after this experience due to the kindness of participant #337. Isn't it lovely that, despite the negativity we often see on the news, some individuals have a big heart and will still be nice to strangers.