Every coin here uses the same curve: 1B supply, 793.1M sold on the curve, graduates to Raydium at 85 SOL. On the curve, trades cost 0.5% (0.25% Raydium, 0.25% us) and nothing goes to the creator. After graduation, Raydium's pool pays the creator 0.05% of every trade.
Your buy goes in the same transaction as the launch, so nobody can buy before you.