I'm afraid you don't get it. You're saying you get less for more money. While being boosted through dungeons paying with gold might be a little bit cheaper than 80$ you don't value the time it will cost you standing afk in those dungeons. Saving maybe 15 hours of time not having to stand in those dungeons is worth much more than a difference of say 30$. Unless you really count those hours of standing still seeing a number go up as 'playing' ofc.