Choosing a good influencer marketing agency involves many factors related to their quality and pricing. Some of the factors include:

1. Influencer Network: Look at the agency’s network of influencers. Do they already have a strong relationship with influencers in your niche? And do they offer suitable options for your campaign?

2. Experience: How many years has the agency been operating? More experienced agencies have a deeper understanding of how to navigate the influencer marketing landscape.

3. Success Stories: Previous success stories can serve as proof of an agency’s effectiveness. Do they have a portfolio that showcases successful campaigns they’ve done in the past?

4. Services: What services does the agency provide? Comprehensive agencies offer more than just connecting brands with influencers. They can support in areas like content creation, campaign strategy, and analytics.

5. Pricing: Compare the agency’s pricing with your budget. Does the agency’s cost fit within your company’s marketing budget without compromising on the quality of the campaign?

6. Analysis and Reporting: A good agency will offer regular analysis and reporting so you can see the progress and results of your campaign.

7. Process: How does their process work? A good agency will have an organized process from discovery to post-campaign analysis.

In the context of influencer marketing platforms, agencies might vary in their approach. For example, Flinque enables precise influencer discovery, provides robust campaign workflows, and offers detailed audience analytics. However, the choice of a platform or an agency largely depends on your specific needs. Each approach has its own strengths and the suitability depends on your team’s requirements, budget, among other factors.