Is participation in newspaper competitions, which require purchasing the newspaper and offer monetary prizes to winners, considered gambling?

There is no impediment to purchasing a newspaper or magazine with the intention of reading it, benefiting from it, and then participating in a competition. However, if the sole purpose is to participate in the competition to obtain money, then this falls under prohibited gambling ( Maysir (definition)), because the newspaper offers prizes to increase its sales, and the participant pays a small amount to risk either a large gain or the loss of what he paid.