I prefer to think that it is more help than you gave to others and the quality of your help.
Getting traffic and selling must be a second step in the process. It all starts with hard work, helping people for free and creating a community that trusts you and recognizes your value.
Back to Facebook ads, one of the most erroneous myths is that you can promote your service to foreigners and then blame them because they do not want to buy. They do not buy mainly because you have never proven yourself before.