I've got the same issue of 100s of other (as I've just discovered browsing these forums) : trying to use a custom domain and getting the infamous "domain name can't be used because it contains a protected word or inappropriate language".

Domain: promodue.com

Description: a real world (as in: not online/digital) marketing, promotion and advertising company.

Wanted to move from gapps but I'm now concerned about the timing since I see a lot of other people have been waiting months for this to be resolved for them

Let me know, thanks a lot in advance