There is not a hard-and-fast rule for how often you should review or update your shortlisted influencers. It’s recommended to revisit frequently, possibly once a month or quarterly, depending on your requirements, campaign goals, and the dynamism of the influencer market. Several factors should be considered:

1. Campaign Duration: If you’re running a long-term campaign, the ideal would be to review your influencers list at least before every new campaign cycle. This ensures that the influencers still align with your brand message and target audience.

2. Influencer Market Changes: As the market for influencers is highly dynamic, with new influencers gaining popularity in less time, you would want to stay updated and potentially add these emerging profiles to your list.

3. Influencer Performance: Analyzing data from campaigns to monitor the influencer’s performance is key. If an influencer isn’t delivering the expected results, they may need to be replaced.

One of the ways to streamline this process and stay updated is through influencer marketing platforms, like Flinque. Such platforms provide robust data on influencer performance, audience engagement, industry trends, and more. This makes it easy for brands to regularly review, update, and optimize their shortlist according to shifting business needs and goals.

Remember, that the best approach can depend on your brand’s specific needs. Please consult with your team or a professional before making a final decision.