I often see custom games with a komi changed to 6.5.
I am not sure that players are always aware that changing the default komi make the game unrated.
I think that still a bunch of players think 6.5 is the right komi. After all you don’t have to trust AIs.
So maybe it would be more user friendly to let games with 6.5 komi be rated too.
Ohh.
Even when the ranked box is checked, the game will be unranked?
And the ‘right’ komi is not 6.5? 
If you check the ranked box I don’t think you can change the Komi, it’s stuck on auto.
6.5 is the automatic for Japanese rules and I think 7.5 for Chinese and other area scoring rules no?
I believe rated custom komi games are planned for the v6 ratings update
Perfect Komi (the komi that makes Black’s winrate closest to 50% (draws count as ½ win)) for territory scoring is 6.5
But Fair Komi (the komi that maximizes the draw rate) for territory scoring is 6.0, and both Fair Komi and Perfect Komi for both Area Scoring and Stone Scoring are 7.0
So at the very least a right komi is 6.5, and depending on whether or not you like draws, if you’re playing territory scoring, it might be the right komi for your game 
(PS: these figures only apply to board sizes 9x9 and larger. 7x7 Area Scoring Fair Komi is 9.0, and 5x5 Area Scoring Fair Komi is 25.0)
Only games with automatic komi can be ranked. All games with custom komi are unranked. If someone sets a custom komi to 6.5 or 7.5 it will always be unranked xD
I suppose this is similar to considering komi as just a more fine-grained form of handicap, and the rating system accounting for komi like that.
I think it’s even already the case on smaller boards. Although it seems to be broken for a long time already, a fix is in the pipeline: Proposal: Redesign small board komi and handicap. From there it seems a small step to include non-standard komi 19x19 games as ranked games.
Currently, yes. Hopefully will change with the v6 ratings update
