In most cases yes. Advertising expenditure is directly related to the profit/sales of a company in the present business model scenario, what with every company wanting more of the consumer/customers mind share. the best way of assuring that seems to be to assure your customer sees your name every few minutes, apart from passable quality.
This therefore means any of the following:
a) a co product is excellent, hence ppl buy, hence higher sales, hence bigger, better ads
b) bigger better ads remind pl and they buy the product, resulting in more sales, hence more bigger, better ads
where did it all begin? the product?!!