Don’t know about specific sites about EBBs but I’ve seen a lot of discussion on them on the MTBR site. (Lots of americans on there tho keen to show how well lined up their big fat ducks are). They have manufacturer specific forums, single speed forums etc so you can narrow the search and I found the search facillity is quite good.
For what it’s worth my experience seems to be people recommend wrapping in PTFE tape, grease and other variations on that theme and torquing to the recommended setting. Works for some people, usually the lighter people, not for others inc. me. Mind if I ask what weight the folks sucessfully using the Thorns are? The theory seems to rely on slight deformation as well as friction stop the EBB turningMy. Just seems fundamentally wrong to me that something you need to stop from slipping that you would fill it with friction reducing stuff like grease or ptfe so that when it does move it doesn’t creak.
Niner uses two grub screws to bite into an alu EBB – crude and ugly. Works for some including me for about 5okm which isn’t enough for an everyday bike. I replaced it with a carver EBB which expands (Think the Bushnells works the same?) It’s far better but still not perfect. I’d think the clamping type arrangement with a split ENN shell and two flanges being pulled together with dirty great bolts would be better but I don’t know.
While you’re researching creaky EBBs you’ll probably come across plenty of referances to creaky sliding dropouts too so I’m not sure there’s a perfect solution. Eccentric chain adjuster work fine on motorbikes but weight isn’t quite the same issue I suppose.
As for niche alternatives – you don’t see spot brand on every corner and with exchange rates as they are it’s unlikely to change. How come the country that started this financial mess has such a strong currency at the moment?
Sorry for the long post