I agree. Some domination tasks get old with time and it doesn't make sense that people complete them after two weeks because it will not have the same effect anymore. For example Facebook poll, after one or two weeks that poll will be old and no-one will see it because there are newer posts.
I suggest that you sort domination tasks by date of starting. Because at the moment, threads are sorted by time of last comment and this means that old domination tasks get on top of the list when someone comments on them and I don't like that.
Exactly. If there are tasks which has effect then it doesn't to be opened for a longer time and until it has effect.
Polls and some video comments are example of that, these things needs to be done as soon as possible because many people doesn't watch obsolete videos.
But reviews on sites are good example of a permanent tasks which has effect even after month or longer.