How many countries have a national draughts association?

There's a complete list on the FMJD (world draughts federation) website:
fmjd.org/?p=all

When are there going to be new draughts variants and custom board sizes?

The next variant will likely be antidraughts. We can't promise a timeframe, but it may not be that long. Not sure if there will ever be different board sizes though!

Main priority atm is to expand the current features with computer play and analysis, and to add more learning tools.

@RoepStoep What are the rules of antidrauggts? Is it just that the winner becomes loser? Are there any additional rules?

en.m.wikipedia.org/wiki/Draughts

The basic idea would be to achieve the opposite of draughts: the player that can't move anymore wins the game.

I'd say all other rules would remain the same (forced captures, promotion etc), though I'm not sure there's "official" rules

Please implement English draughts. The rules are as follows:
1. Draughts can move and capture only forward. No backwards moves or captures.
2. Queen can go one square forward or bavkwards. Queen can capture backwards (like standard draughts here).
It's very commonly played variant. So is the anti version of it.

Seems like the devs are going to be busy :). I really appreciate the work that's been put into this site so far, I hope it can become as vibrant as lichess one day!

@So we can play casual antidraughts even now.