Can I respond those discussion which was started 1 or more years before?

Yes of course you can. There are no restrictions to responding to old discussions. We still earn for our participation in those discussions. No discussion would be too old to participate.

Hi there, ofcourse, you can respond to discussions that had been started a year ago or so.. sometimes when I don't find interesting topic for the day, I would really take the time to browse older discussions that I feel that I haven't answered yet as long as it is an interesting topic. However, as much as possbile, I reply on the new discussions or hot discussions for the month and last month because they are the most recent posts by our active mylotters! Thank you for the discussion. Happy Mylotting and Have a great day! Cheers!

If all you're after is credits for comments, go ahead. You can reply to any discussion that's still on the site, but the point of being here is talking to other people. There's always a good chance that the person who started the discussion a year ago isn't even on Mylot any more, or the discussion is buried so far down the list of discussions they started that they won't even notice that someone has left a comment.