To me it is still an open question, with what multiplier you will be presented in the leader board if you buy a bonus feature? It would be logical to assume that the bet was $10, if the feature was bought, but, on the other hand, as @cmonman said, technically his bet was indeed just 10 cents.
Depends on how the host processed it. Normally if you buy a feature, your wagered amount is the price of the bonus feature and most casino count it that way. I don't know about Chips if they process it that way too since I have not bought any feature in slot hosted by Chips, I just do the normal spins.