Will sponsored services bring me buyers?

The answer is: yes. 

Yes, if your service has a nice and clear image that people want to click on. 

Yes, if your service is in an in-demand category on ComeUp.

Yes, if your service has genuine added value for the buyer.

Yes, if your service description is clear, flawless, and highlights your skills.

Yes, if your prices correspond to the type of buyers you are targeting.

Yes, if you have at least one positive review. That's usually what makes another customer decide to buy.

In short, paying for a campaign won't guarantee a sale if everything you offer isn't perfect: service, profile, image. You need to be sure of the quality of what you're offering, and then you'll have a good chance of getting new buyers!