Chase is very lenient with their bonus rewards. In many cases if you even fall short of the bonus requirements they typically honor it anyway.
When I got my CSP I had referred a friend to get it. He went it to the branch and they offered him 40k points with only 2K of purchases in the first 90 days. (That was the offer in my local chase branch) I called chase and told them that I had referred a friend and he got less requirements for the bonus, she told me she would submit a case for this. I received a letter stating that if I don't hit the $3k spending, by the end of 90 days, they will honor it with the $2k I had already spent on the card. I knew I would hit the $3k in less than 60 days but I wanted to be assured I would get my bonus even if for some reason I didn't hit the $3k. Lol