Hey Thumpin, I'd be very interested to hear from the "several owner's" who claim to get decent k's out of them, seriously.
The RE050's are notorious for poor milage... just google them, you'll see.
But dont take my word for it.... do a little research on "tread wear grade" and you'll see what I'm talking about. The Bridgestone's in question have a rating 140, and whilst you cant really compare trade ratings from one manufacturer to another, you CAN from the same manufacturer. And when you do that, you'll be hard pressed to find another tyre made by Bridgestone with a lower tread wear rating. They are targeted specifically as a softer compound tyre mate.... and "high wear life" is not part of the sales spiel, you can trust me on that.
Also, with the picture you've provided.... it's a little hard to tell due to the shadow, but it looks like you are either underinflating your tyres or there is a camber issue on your car.... because it appears as though you are getting A LOT more wear on the outside of your tyres than you are on the inside. And if what you say is true.... and you did drive almost 20,000km more on these tyres youve taken a picture of, you were most certainly putting yourself in danger mate. They are hardly roadworthy as is (very close) let alone another 20,000km! Look at the tyre edge... how the hell you were getting traction in the wet around a corner is beyond me... virtually nothing left. Minimum legal tread depth is 1.5mm across the full face of the tyre. You'll be lucky to have that at the edges.