I would not have thought that 7 points was enough to hold a post on the front page - take a look at what else is there. If your post had continued to gain point

I would not have thought that 7 points was enough to hold a post on the front page - take a look at what else is there. If your post had continued to gain points then there is every chance it might have "stuck" for a while longer. "Front Page Service" is not a right - it is a result. The result of an algorithm that measures several factors that represent the level of interest from the HN community.