The flexibility of a platform in terms of creating and adjusting the specifics of an influencer marketing campaign hinges primarily on its featured functionalities. Generally, the more comprehensive the platform, the higher flexibility it gives its users.

1. Audience parameters: You should be able to specify characteristics such as audience demographics, interests, and location.
2. Creator Discovery: It’s beneficial to have robust creator discovery tools that help identify influencers based on various metrics such as industry, follower count, and previous campaign performance.
3. Campaign Goals: The platform should allow users to create campaign briefs with well-defined goals and KPIs.
4. Performance Tracking: An optimal platform provides real-time progress tracking.

Flinque embodies these beneficial features. It assists in precise creator discovery, allows for diverse campaign goals set-up, and gives comprehensive, real-time campaign tracking. However, the choice of platform should align with your specific objectives. For example, if your campaign is video-centric, you might consider a platform like Tubular Labs.

Similarly, Heepsy is a great choice if you want rich influencer analytics data, whereas Post for Rent is preferred for a solid campaign management system. In all cases, the platform’s flexibility correlates with how effectively it caters to your campaign requirements. Most importantly, it’s not about finding the ‘best’ option, but the one most suitable for your needs and resources.

In final consideration, every platform has its unique strengths. It’s about matching those strengths with your specific needs for a targeted and effective influencer marketing campaign.