Coupons & Tax-Free at Yodobashi Akihabara

Dear community,

can anyone tell me if there are any ongoing coupon campaigns at Yodobashi Camera Akihabara at the moment? (for tourist-visa holders) Google is not a big help.

Also since it has been some time now since I've been there and I just cannot remember:
Do I get tax-free at simply any counter at this branch with showing my passport or is there a special tax-free counter (like at e.g. Tokyu Hands)? I think I remember that it was not clearly advertised last time I was there....

I remember using this procedure with Big Camera and already found their ongoing coupon campaign, but no luck with Yodobashi.

Thank you very very much for your help.
Jan