The free glyphs don't bother me at all - as you said above the real gold is made during the first patch or two of each expansion. Has been that way for a long time. The only glyphs I sell are those form the levelling process of new scribes. ( I like to start expansions with 5 scribes to make the most out of the DMCs )
Plus going through that list there are only three I can see that I have on my level capped toons , three out of 27 slots --the free ones are useless.
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Your kidding arnt you - glyphs while levelling -- absolutely not needed , neither are gems or enchants, I will go further, glyphs enchants and gems arnt needed unless you raid .
And those whinging about the price of glyphs, its a free market, things sell for what people are prepared to pay, don't like it the price don't buy it, go make your own scribe instead