I don't know about the population of SRP, but in general body sprays are quite popular. In contrast the number of people who use perfume is rather small.

For most it's a question of value, but comparing body spray to an EDT is rather like comparing cartridge razors to a straight razor. Consider that the average fragrance bottle of 3.4 ounces (100mls) provides around 12 sprays per ml, or 1,200 sprays per bottle. At four sprays a day, in other words, the bottle will last close to a year. How much is a years supply of body spray? A single bottle of perfume (of comparable quality to most body sprays) can be purchased for as little as 10-15 USD. Some very good scents, far exceeding the quality of any body spray, can be purchased for less than 50 USD per bottle. You could well use as little as one or two sprays of your fragrance a day though whether as a matter of preference or because it is very long-lasting and strong. Cost does not really factor into this as there are strong, long-lasting scents in all price ranges.

Now in my experience most body sprays only last a few hours. This is low-end longevity for an EDT - some last for days - and even many colognes so in other words in the simple, quantifiable test of longevity the average perfume offers a superior product. A superior product that can be purchased for a comparable, or much lower price in other words.

So an EDT lasts longer, and can be cheaper in the long-run. On a more subjective level I personally find most body sprays offer very poor quality fragrances. This isn't simply me poo-pooing these brands nor is it a question of elitism. If you want to examine it for yourself find a fragrance which has a companion deodorant spray or similar products: some of these are very expensive indeed. They are almost all dismal quality in contrast to the EDT.