I'm absolutely not implying this is the case with any of the people here struggling to get responses, but one "strategy" I use to help get prompt replies is that I relegate my chats with reps from sources to placing and paying for orders. Any questions or random discussion about products I'll address here in the sources thread. I think it can be tiresome for reps to be answering a bunch of questions through direct messages, and they may tend to avoid chats that aren't as lucrative or don't net them a high return on investment for their time. Not saying it is this way for sure, it's just something I personally do just in case.