It depends on who you are targeting. Most techies have ad blockers or are immune to advertisement. If you set your campaign to "pay per click", then you won't pay until someone clicks on your ad. What you should be optimizing for is
conversion rate, which is basically the rate at which people who click on your ad turn into paying customers. Getting them on your website is only the first step, keeping them there (or having them return to it) is your next challenge. Turning them into paying customers is your goal.
Your best bet is to play around with small tests (50$ budget) and see what works for the market you are targeting, there are no catch-all answers we can give you.
m_zeid wroterolf wroteThe nice thing about FB ads is that you can target them quite specifically. If you have a catchy concept and target the ads in a smart way, you should see some amount of success.
yes, but do people bother checking and clicking on the ads? Do you?