Influencer marketing platforms deal with demographic shifts by continually monitoring and analyzing influencer audiences. Key features include:

1. Real-time Analytics: Real-time data of an influencer’s audience, such as age, location, interests, enables platforms to capture demographic changes as they happen. For instance, Flinque offers real-time insights helping brands adjust their campaigns timely in response to shifts.

2. Historical Data: Analyzing historical follower data can show demographic trends over time. This can be useful to anticipate future shifts and align marketing strategies accordingly.

3. Automated Tracking: Advanced influencer platforms use AI and machine learning algorithms to automate demographic tracking and highlight significant changes for user attention.

4. Segmentation Tools: These enable the breakdown of an influencer’s audience into distinct segments based on demographics, aiding brands to target specific groups effectively.

5. Influencer Discovery: Platforms like Flinque, for example, steadily update their database with new influencers, ensuring brands can reach evolving demographics and niches.

6. Competitive Analysis: Comparison with competitors’ influencer audiences can give insights into demographic changes in the broader market.

Remember, platforms variedly address audience tracking. The value lies in how well these tools align with your specific needs and how effectively they are leveraged.