Aimfox campaigns rely on searching data from LinkedIn to create your Audience. However, there is a limit to the number of searches you can do on LinkedIn, depending on your plan.
Limitations for LinkedIn Search on Aimfox
Free LinkedIn accounts have a highly limited number of search results per month, while paid plans like Premium, Recruiter and Sales Navigator have a much higher limit. Even with a paid plan, there is always a limit.
If your account has reached the search limit, LinkedIn will not be returning any results for your queries, and you will have to wait before trying again. Limits usually reset every day.
To learn more about LinkedIn limits you can read the official LinkedIn search limitation article: Monthly People Searches on LinkedIn