2.8btc for an account is nuts. Unfortunately I think most people who buy accounts for that much probably want them for nefarious reasons. Can't see why they would pay that much otherwise. What are the alt coin deals? I don't go in the alt section much so not up to date with any of their campaigns. Is there a alt coin sig overview thread or something?
the account had no trust so they could do limited damage with it. It hasn't been very active since it was purchased. I'm not sure what the plan is but there is no reason to pay that much to do something bad if they could get a hero account for less (maybe it was the fact that the posts were made in good English which makes it less unprofessional).
I don't think there is a thread about alt coin campaigns but one person bought 5 accounts and put them all on the VPN coin campaign, appearently they pay Vpn coins every few days if you at least log in and it is based on your activity. I can find the thread if you are interested. I'm not sure what Vpn coin does as I am really not interested in alts.
EDIT: you also need to remember that hero accounts are very rare as there are only a few hundred of them and they are not available very often. If someone wants the prestige of a hero account and doesn't want to wait they will need to pay a preimum. If they are willing to wait some time then they might be able to snag a better price.