Hi there,
As @ThompsonN13 mentioned, AnswerHub is designed to be used by the community to both ask and answer questions, but only works if the community helps others out. With that said, Epic staff do answer questions on here every day (even on the weekends from home, on their days off), but there are so many questions asked here that they would need to triple their current support staff to get anywhere near answering them all. Another issue currently affecting Answerhub is that Fortnite has become a big hit and poached most of the UE4 support staff. The sheer volume of Fortnite issues has even required programmers and artists to become part time support staff. They have, and still are adding more staff, but UE4 is quite complex and it takes time to get them up to speed.
I know it can be frustrating when you don’t receive an answer. To ensure the best chance of getting a reply make sure to use a short title that details the issue in general terms, but has enough detail for someone reading it to know what the issue is about without reading the content. For example, more people will view a question titled “Issue with particle dynamic parameter” than “Dynamic parameter not working”.
If you require more support for your project than AnswerHub provides, Epic does have custom licencing and support solutions available, but they are not free:
Thanks