Can You Build Too Many Links Too Fast?
There is no figure which you use for creating number of backlinks. Think about it for a minute.
Have you checked that when new website launched then they get ton of outstanding press, which leads to tons of outstanding backlinks.
Now if Google finds out that all those baclinks and observes also a vast spike in news and social activity around the website, I think they know these backlinks are unethical, I assume that would take off the red flag.
Be careful when you do social activity, especially if they make it to the news, be careful.