Being Suvarnabhumi is a bit further from central Bangkok than Don Muang, and given that prices of just about everything go up over time, I don't know that I'd call it a ripoff myself. A poor value though it is, considering that on my last trip I took a taxi from the airport to Sukhumvit, near Emporium for 200 baht total, including tollway and got there much faster than I would have by using the express bus. That was with me and my wife, so if we'd taken the bus it would have cost 300 baht, plus then we'd have to walk or take a taxi from the bus stop to our condo. BTW, we got the taxi on Level 4, so no waiting in line and no 50 baht fee, and the driver was very pleased to be getting a fare back into town.