For the product in question, they aren't using more added sugars than fruit.

As you can read on the label:

    Ingredients: Strawberries, High Fructose Corn syrup, Corn syrup, Sugar, Fruit Pectin, Citric Acid.

    Serving Size              20g

    Total Sugars              12g
       Total Added Sugars      9g

And that's weighted by share of the output. If you're measuring the input, this recipe is going to take a lot more "fruit" than "sugar", because part of making jam is boiling away a bunch of the water that occurs in fruit, whereas all of the added sugar is retained. (Corn syrup, however, seems to be about 2/3 water, which will make that comparison look worse.)