Example: I pug my upgrade tokens, because the heroic clears of my guilds are on Wednesday and not mandatory. I would prefer to do something else Wednesday night, so I don't participate. Quite a few of my guildmates handle it that way. We use the wide variety of fast upgrade groups, that are aimed at people in our situation. Also some of us use different characters for progress on different bosses, while the guild only clears heroic once at times, so they bring their lowest geared char to the guild run and pug with the others.