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Maybe a little more in a month.

poloniex.com pays out about 50% apr - that is just an average, but most do better.

I just looked it up. Based on the 30 day average a $100 loan with get a 361% return over 365 days.

You can check here, the calculator is on the right: https://bitconnect.co/learning-center/bitconnect-bitcoin-price-volatility-software