We did not try their PPC listing. Just keeping our profile up-to-date and ask our customers to share their experience about us there.

I cannot measure impact directly, but I think it worth my time to maintain a good looking profile at a resource with estimated monthly visitors = 7.4M (according to SimilarWeb).

Also, if you search for example "best time tracking software" in Google, they are on first page. And it costs $0.