0frollard 8 years ago ReplyUpvoteThrough various internet technologies, secure sections can be built that allow various different users to do/access different things. There are hundreds of such login schemes. I recommend a web-design course. Instructables is tailor built in this case to have users stored in a database, and if you pay or win a pro membership, that user account is flagged as pro for a given amount of time. Various other parts of the website read this database and display different pages based on the member status.