A recent article in the NYT's biz section predicted a 15% increase in on-line ad revenues at the expense of traditional marketing outlets like newspapers and periodicals, and electronic, i.e. radio and TV.
There are more buyers on the web each year and more ways to attract new clients and customers to your site. The dynamics change at lightning speed so what worked last year is search engine taboo now.
There's an on-going battle between SEOs who are trying their best to manipulate search engine activity for the benefit of their clients, and the math monkeys who create search engine algorithms based on an ever-changing list of ranking factors.
Thus, it's a constant (daily) challenge to keep any web site optimized, and, in fact, tactics employed as positive ranking factors a few years ago are now considered negatives in the eyes of bots spidering your site, i.e. stuffing headlines with keywords.
To attract site traffic your site should be optimized on- and off-site. Through the use of off-site marketing strategies, it's easy to create a larger web presence in just a few months.
Oh, and you'll be able to cash in on some of that web dough floating around.