French people's preferred means of payment for an amount under ten euros 2015

The question was phrased by the source as follows: "Overall, regardless of the amount to be paid or circumstances, what is your preferred method of payment?"
The source adds the following information: "Bank transfer, direct debit from my bank account, an application on my smartphone allowing me to pay directly with my phone and an online payment service like paypal and paylib are all less than 1%."