Why can most variants be played only in casual correspondence? The only variants that support rated correspondence are Chess, International Draughts, Shogi, Oware and Togyzkumalak
Thanks for raising this issue, sounds like a bug, we will look into it.
Some context - Chess has many ratings (for the different clock types), whereas our other games only have 1 rating (for all clock types). We are looking to make a change in the future to be consistent with ratings across all of our games (e.g. one for slow play/correspondence and at least one for faster time controls).