I have two friends in my guild who are interested in getting my opinion about a couple of the adventure packs I have. At most, they'd probably buy one adventure pack each. I have spent some real money and also grinding in-game for TPs on my account. I purchased a few adventure packs.
Problem is, the guest passes are overpriced for letting them see a little of the packs I purchased. For example, Delera's Tomb is 120 TP for a guess pass for 90 minutes, per person. To invite the two friends for a good gaming session at about 2 to 3 hours, I'd have two buy four guest passes which comes to 480 TP. That's around the price of another adventure pack in itself.
The math doesn't add-up.
A more reasonable amount would be 150 TP to invite up to a full party of friends to try ANY adventure pack I have for 3 hours. After all, people buy adventure packs to repeat the quests for XP and loot (after the initial experience).
Or better yet, a trial run for 50 TP to let a full party of people take a look at ANY adventure packs I have for 30 minutes.
In short, the PER person, PER 90 minutes, and PER adventure pack means I'll never purchase them.