I do appreciate your time and effort, as well as the brilliant idea.
In addition to the credits (论坛币,积分,经验) you granted, "showing off" itself can be a big motivation as long as people don't take it negatively.
The only thing I'd like to add is more interactions should be encouraged. Regarding to studying English, it's always good to have another pair of eyes on your post, and that's how we make progress.