Purchase of information items from a merchant over the Internet or other network is implemented so as to ensure that the merchant is unable to identify the particular information item purchased by a user. A second distractor arm includes a third end portion coupled to the crossbar and a fourth end portion with a second bore configured to receive a second coupling portion of a second pin. A circuit board is provided having a plurality of mounting pads that is electrically connected to the plurality of first solder balls. The Park transform module generates a current signal in response to the orthogonal current signals and an angle signal. The image sensor also generates the images of the surface of the tactile interface device exclusive of the images of the contact navigation surface. If the retailer does not stock the referred product or a set number of consumers in the consumer database other than the referring consumer have not already referred the referred product to the referred retailer, then the referred product and the referred retailer are entered into the consumer entry in the consumer database.