Just because they didn't respond doesn't mean they don't read and consider them, and you would be surprised at how seriously some companies take direct communications from their customers. Many even have policies in place to respond to any and all customer complaints and concerns. How many contacts do you think WotC gets in a week that aren't something like rules questions of WPN issues? The few that they get would be notable just by their existence, and I'm reasonably sure that they would at least get a "thank you for contacting us, we'll take your opinions into consideration" reply.
I guess I will take my chances with the forums rather then sending an email to customer service in India and hoping it gets passed along up the chain.
My concern with the debate threads about WotC's business decisions is it does nothing to support other players, does nothing to improve the game, contributes nothing the community can use as a resource, and just creates dissent for the purpose of dissent. At best it is armchair quarterbacking. The D&D 5th Edition forum here describes itself as "Discuss D&D 5E rules and products". WotC's communication skills and business decisions fit under neither rules nor products. It would be nice if there was a forum on EN World dedicated to discussing the industry and business of RPGs where these discussions would fit better, but currently there doesn't appear to be anything of the sort.
Realistically if you do not like to discuss something then it would be better to just not discuss something. And if it is true that 99% of DnD players never use the forums then discussing 5e is not going to hurt it anyway.