MASHABLE - Aug 11 - Tinder has recently settled an age discrimination lawsuit in California, which saw users over 29 paying double what younger people were for the subscription. Now the Australian consumer organisation Choice has filed an official complaint with the national consumer commission, the ACCC, after conducting a mystery-shopper survey that found prices for a one-month subscription to Tinder Plus ranged from AUD$6.99 to AUD$34, with no transparency upfront about the variation. The highest price( $34) was for a straight man over 50 in a metro area; the lowest was $6.99 for a queer woman under 30, also in the city. "Based on our mystery shop, we know that Tinder is using age to set different prices. But even within age groups, we saw a range of prices, demonstrating that there are other factors at play that Tinder is yet to explain," said Choice director of campaigns Erin Turner in a statement.