When influencers are not able to meet agreed upon timelines for a campaign, the following strategies can help brands navigate the situation effectively:

1. Open Communication: Always maintain open communication with the influencer, understand the reasons for the delay, and aim for a rescheduled timeline that works for both parties.

2. Be Flexible: While brands must adhere to campaign timelines, some flexibility can lead to better content and a healthier working relationship. This might mean adjusting deadlines or reshuffling campaign elements.

3. Contingency Plan: Always have a backup plan. Include an alternate influencer who could step in if necessary or plan for content that can be quickly produced in-house.

4. Contractual Clauses: Include clauses in the influencer agreement or contract that cover these scenarios – this could be penalties for late deliveries, or options to cancel the partnership without negative repercussions.

5. Influencer Platforms: Use influencer marketing platforms, like Flinque, which allow for robust project management features to keep track of campaign deadlines and better manage timelines.

Platforms like Flinque have sophisticated audience analytics to help brands find influencers who are reliable and known for punctuality. However, the choice of platform depends on your specific needs and goals. Experiencing an influencer missing a timeline can be frustrating and may impact the campaign effectiveness. However, if you adopt the right strategies, it should not set your entire campaign back. Act proactively, prepare for such eventualities and keep open channels of communication to manage the situation effectively.