JMO, take it or leave it.
SgtSpike, you would qualify for a good scammer I guess. I mean if I don't check that site in 90 days (they can't mail me neither), they should legally own my coins without me shouting "SCAMMER"? No way!
If bitcoin goes through the roof now, they put some notice that the service will be discontinued by blabla and start walletinsta.com instead?
I would expect to have all the funds available for 10$ processing fee for years after closing the service. You can't just take your user's money. (I mean legally you might be allowed to do so after a certain time but for me bitcoin is still very much about honesty, trust and reputation ... or anarchy if you prefer that word.)