There are three main memberships which each member of the Android subreddit can obtain. The first level of membership for this community are the commenters. This is the lowest level of membership in terms of authority. When first joining the Android subreddit, each member will start as a commenter. A commenter's role is to keep the comment threads lively. They will do this by starting or joining the conversations inside of a comment thread. In addition, these members will usually use Reddit more casually.
The next membership is a thread creator. These members are the users who create the various topic threads in the Android subreddit. Apart from the three main threads used to communicate, most topics and comment threads are created by the thread creators. To become a recognizable thread creator, users must obtain digital points called Karma which can be earned throughout different tasks in reddit. If a member has more Karma, their posts will be more likely read by other users than users with a low amount of Karma. The first effective way of gaining karma is by commenting on topic threads. If a user receives an upvote, also called a like, they will gain Karma. Another effective way to get Karma is by creating a popular comment thread.
Example of how one's karma may display.
The final level of membership of the Android subreddit is a moderator. A moderator, also called a mod, is the role which has the most authority throughout the subreddit. The role of the members with this membership is to prevent hateful comments and disrespectful people from tarnishing the experience of the Android subreddit for other normal users. Overall, they want to keep this subreddit a safe and respectful place where Android users can peacefully communicate with each other. To become a mod for the Android subreddit, the user must show their dedication to the Android reddit community, have several Karma points, and they must have been apart of the community for more than a short while.
TLDR: The main levels of membership include the commenter, thread creator, and moderator. These different memberships all have their own specific roles in which allow the Android subreddit to continue being a hub for Android users.