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azurewelkin (Cosmos) 于 (Tue Nov 13 13:56:20 2007) 提到:
Pay your PayPal using Citi CashReturns in maximum each time
PayPal will charge about 2% and deposit the rest in your checking/savings in 3 days
So you get about 5%-2%=3% every 3 days, that's 1% daily periodic rate, and (
1+0.01)^365-1=3600% APY!!! During the 3-month period, you can earn (1+0.01)^90-1=1.4 times your credit line.
Any obvious risk?
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