Very little. In the UK an amateur cannot accept a prize with a retail value of more than £500, in the US it is $750.
A professional caddie can work for any competitor, in any competition, professional or amateur, with no recourse from the rules of the USGA.
Not all amateur dramatic performances are self directed by the lead player. There are some that are, and there are also some performances that are not.
Rod Laver was the only Tennis player who won the Grand Slams in both amateur and open era.
The Windows version of Flash Player works, almost everything that worked in Vista works in 7 without changing anything.
You find contact information for an amateur team in the town you're going to and contact them. Amateur league teams will take just about any decent player, as there are no restrictions on nationality.
Let player 2 beat player 1 because a level will never drop
Amateur, literally, is when you aren't paid. If you're getting paid to play soccer, then you're a professional. If you're not, then you're an amateur.
Baseball's amateur player draft has 50 rounds
Libby Harrison is an amateur tennis player with the Bowling Green Falcons.