Once everyone gets their glyphs, they don't need to keep getting more. The good money that was to be made with this profession has been made. Now everyone is undercutting each other into oblivion. Maybe there will be epic level glyphs that will drop from dungeons? I still think the same outcome is inevitable. Its not like jewel crafting or enchanting when people get upgrades to their gear, then they'll need to get new gems/enchants.