>> Not exacty, but... try to send reg. key manually with some delay. This will give you some protection from that kind of purchases
>
>I tried to eliminate that waiting period for a customer between purchasing a subscription and getting access to the website. Any such delay can be extremely frustrating for a developer who sometimes needs to get a solution right now.

Well you could give access to just one article/definition upon subscription, then after the delay period, give access to the rest, don't you think?