Expanding what Members can do should be able to expand membership. Currently, while the member’s features are nice and all, they’re not at a point that I care about. Some ideas:
Proficiency Mode: Similar to listening practice and speed review. Difference is this tests all questions in course whether learned or not unless ignored (basically, it’s as if you auto learned the whole course). Great for testing out a new course in full. Tracks member’s overall results (%, total questions asked).
Competition Mode: Speed review, but live competition. Challenge friends or subscribed members to the course. Rotate around members to answer till timer runs out for one of you. Could be interesting with voice chat.
Pause/stop timer: Frequently requested option. Currently limited to mobile or grease monkey scripts. Useful for courses that have sentences for reading/comprehension as questions or Kanji courses where users want to write out kanji first.
Show multiple choices: For typing or tapping answers, there’s a “show multiple choice” that reveals up to 8 possible options. Answers must still be typed or tapped in though.
Autolearn: Currently limited to course creator and contributors. Gives members option to bypass the first 6 “learning” questions. Useful for courses that have outside study material such as grammar courses.
Bulk upload of audio: Gods this. As a course creator, the biggest time drain is loading audio. I’d love as a member to be able to upload up to 20 audio clips per database page. More if possible.
Message members/users forum profile: For those that attach their memrise account to their forum account. Gives ability for a Member to message such a person.
There are bound to be many other ideas to expand this concept such as bulk editing of items (ex. adding a column to existing database and being able to populate it in bulk). Personally, I’m a member to show my support as I like what Memrise offers to people. Giving this to members can be what encourages more to pay for additional features be they students or course creators.