You would have to be delusional to think this database would be worth 100BTC lol.
It wouldn't surprise me. Remember we're talking about the details of (probably) 500,000 members.
Sure maybe some people used the same password for the website that they did on some financial account,
and especially for any kind of Bitcoin wallet/ program.
(I'm assuming they put the price so high because people assumed you could use the info to steal coins from members.)
There are more ways to steal Bitcoin than getting someone's wallet.
Look in the OP, he was able to get 0.16-0.17
BTC from 3 members using accounts with little trust. If the could get that with those accounts, what if he got one with Dark Green trust? What if he got one on the DT network? Not to mention that he could also sell the accounts on, or scrape the accounts for personal details to sell.
but anyone with half a brain is going to use different passwords for different sites,
You'd think so, but it's amazing how many people practice terrible security.