Re: what makes roleplay die?
Orcs didn't use imbus because it was made too difficult to get to inbus. Plus, a majority of orchish RP involves fending off humans. Those were pretty much non-existant in inbus. Also, everyone in that has ever played ultima online who knows anything about RP orcs knows that Yew orc fort = RP'd orcs.
I remember my favorite orchish moniker for inbus. "Skahbus." A close second goes to "Skah Uzg."
On topic: Roleplay is on a semi-decline because of the time of the year. Stressful part of the school year and all. If you want to find roleplay... check the area between the Yew orc fort and the Yew guard tower. If you want to have a meaningful conversation with an orc without getting killed on sight, get off your mount before you approach and offer something shiny, food or cyder. If you have a live mount, it might get killed, so be warned.
Or, avoid orcs and talk to your friendly local militia man or woman.