Some premium adventures are unlocked by beating earlier premium adventures and generally story linked with the earlier ones. I really think this should be pointed out before you buy them as having spent my last pizza on a premium only to find the boss was in the next even more epic adventure would leave me frustrated. I'm not saying that the idea of having linked premiums is wrong just the lack of telling me this is step one of a two part adventure is needed. If the prices stay like they are now i personally would have no complains and would just buy the adventure anyway but people have different incomes and budgets.
