The company routinely shuts down products that have become stale. Last year, it shut down Yahoo Directory, which was the cornerstone of the company when it first was founded in 1995. Over the past two and a half years, the company has discontinued more than 60 products.
The temperature range in which most bacteria grow is between 40 degrees F (5 degrees C) and 140 degrees F (60 degrees C). Raw and cooked foods should not be kept in this danger zone any longer than absolutely necessary.
Some bacteria grow more rapidly with heat, ie clostridium perfrigins. Depends on the heat and depends on the bacteria. Most bacterial strains have optimum temperature to grow of 37oC. If you lower it, the cells simply will not grow. If you raise it, their proteins will start coagulating - and the cells will die.