Question about responses or rather, why no responses from sitters?

My wife and I are new to Rover and have been searching for a pet sitter. Is it typical to not receive any response at all when we send a request to a potential sitter? Also when we finally did receive a response that required a follow up from me, I answered immediately and it has been days without a return response. This is very frustrating and I'm wondering if perhaps there is a delay in the system or just an "I don't care" attitude? If it takes this long to respond to a request, I probably don't want them sitting for my babies. Any advice from the Rover community will be greatly appreciated.