Bitcoin Pool #1 -- Each share cost $500 worth of Bitcoin and will pay daily. All shares pay you 50% of whatever is mined and then takes the other 50% to pay for expenses and additional mining shares.
Bitcoin Pool #2 -- Same as Pool #1 except for each share cost $1,000 worth of Bitcoin and pays you 60% of whatever is mined and takes the other 40% to pay for expenses and additional mining shares.
Bitcoin Pool #3 -- Same as Pool #1 except for each share cost $2,000 worth of Bitcoin and pays you 70% of whatever is mined and takes the other 30% to pay for expenses and additional mining shares.