We could all take a lesson from children. As they are growing up, and learning right from wrong, they are constantly testing to see what they can do, and what is not acceptable.
I see hundreds of ads everyday on web, and while there are some good ones, most fall into "ho-hum" variety, and some are downright awful. Now this isn't bad, if they are testing to see what is going to work, and what isn't.
Many put up an ad with no idea as to whether it will produce or not. They let same ad run for a period of time, and wonder why they didn't get results. They then do one of two things. They either blame publication for not generating business for them, or give up entirely and go out of business. Others will run an ad once, and when world doesn't beat a path to their door, they react same way.
It is a proven fact that an ad must be seen five to seven times before someone can be expected to take action. If your ad is targeted to your market, and you are not getting responses, odds are you have a "crummy ad". It is not then time to quit or blame publication. It is time to change ad.
All successful marketers have one thing in common. They are constantly testing effectiveness of their ads. One of most successful that I know, almost always runs more than one ad in same or similar publication at same time. You could put ads side by side, and not realize they were from same person for same thing. She lets each ad run five times, always keeping careful track of drawing power of ads, and keeps strongest and changes weakest.
Mechanically, her method is really quite simple. She uses a different email address in each ad, and a different website address as well. Both websites are exactly same, but have different URL's. She got her websites from a low cost web space provider where she not only reserved name of her site, but got web space as well for less than cost of her ads. There are several low cost web space providers. I can recommend and - You really should go with one that meets your needs at best price. Don't fall for "hoopla" that you get "jillions" of characters of online storage for a few bucks more. You don't need all that room. I have dozens of web sites, and they are all under 10MB of storage. Capabilities being equal - price is boss.