Involvement with Two-For-One Deals
It is a six-item, seven-point Likert-type scale measuring a consumer's inclination to buy brands that have "two-for-one" offers despite the amount of money being saved. This measures a general interest in the deals rather than the likelihood that the behavior occurs for any particular product category. Lichtenstein, Netemeyer, and Burton (1995; Lichtenstein, Burton, and Netemeyer 1997) referred to the scale as buy one - get one free proneness while Burton et al. (1998) called theirs one-free proneness.