When a person brings up the question of how they can hack into a membership site or any other website, normally people tend to question why anyone would want to hack into another person's website. There are hackers who want to hack into a membership site and look for whatever they want while others actually know the section that they are after.
Regardless of that, there are many different reasons why people would want to hack into a membership site or a section of it. One of the reasons is that some people are interested in defacing a website more as a revenge measure for whatever reason. All the same, there is a group of people whose sole reason for hacking into membership sites is passing time and having fun doing it. For a majority of the people who ask this question, they just want to learn how to do it in case they have to use it to their advantage at some point.
It is easier to get to a membership section as compared to hacking into the webmaster section where one can actually deface the website by changing the original text posted. When a hacker puts an effort into doing this, they are on a revenge mission with an aim at reducing the number of people paying to join a particular site. Some of the people who do this actually try to avoid competition from businesspeople in their genre.
When a hacker gets into the membership section of a site, they are able to control the members of that site and use their information without the owners knowing it. For instance, they can be redirected to other sites and increase the membership on that site and either discontinue their current memberships or let the members join both sites.
Hackers can also hack into other people's websites in an attempt to drive traffic from their site and give readers the impression that the site was for a genre that it actually was not by editing the information that is already there. This is done mainly by businesspeople who want to attract traffic by stealing them from others. Although many people hack into membership sites for all the wrong reasons, there are people who do it as a challenge just to see if they can do it. Computer nerds are the most who make up this group because they spend so much time on the internet without any specific reason. Although they do not damage or harm the site, having someone hack into a website is still unsettling for the owner.