Q: Won’t so many links at the same day hurt my rankings?
A: Absolutely not! Why? First reason is the google index. It takes time for google to discover new links and pages on all these thousands of directories. Second reason is because all these directories have a different link approval process and time periods. While some of these links may get approved the same day, the majority will be evenly spread out through the coming days, weeks and some even months. The links will just keep on coming, thus increasing your natural linking profile.