Mods: Please don't auto delete this due to the similarity of another thread. It's different.
As PokeGym uses, a Thanks button would be very useful. It gets rid of a number of spam posts that can bump old threads up, leading to other users to make posts to the likes of "this was already known..." and such.
The button I mention earlier is not like the Karma mechanism that did not work. This Thanks system is doing very well on PokeGym, and I feel that it would make a nice addition.