I don't know what Sprint's threshold is for calling "too many times", but I do know that there are customers who will in fact call their carrier multiple times a day, every day, just to rant. I also know that Sprint is not the only carrier to invite such customers to seek service elsewhere. My best guess is, if you have an issue that requires calling several times in a few days to resolve, this rule won't apply to you. However, if you have called 1000 times in the past year, they might evoke the "no tolerance" rule in the article.