50 posts in a day is nowhere near crazy. A lot of people can manage that. They don't need to be 3 page essays, but something that adds to the conversation.
"Make 10 post in 3 days but that each one get more than 50 views and 10 coments." - This doesn't help at all. Not to mention this is only for threads, not posts. That also means that we need to build a new system for it. "Submit your first resource" - That would only work for one time, these are supposed to be daily tasks. "Submit your first resource that gets more than 5 likes" - That would only work for one time, these are supposed to be daily tasks. "Give 10 likes to different people" - That would only work for one time, these are supposed to be daily tasks.