Brands can ensure that discovered influencers are easily contactable by following these strategies:

1. Direct contact via social media: Most influencers list their business contact information in their social media bios, which are usually available on public profile pages. Brands can directly message influencers, but remember to be professional, concise, and clear about collaboration proposals.

2. Leverage influencer marketing platforms: Platforms such as Flinque, Catch&Release, and Upfluence, among others, provide databases that include contact information of influencers. These platforms often streamline the process of discovery and initiation of contact, offering a more efficient workflow.

3. Influencer agencies: Some influencers work with agencies who handle their business negotiations. If an influencer is part of an agency, contact would probably need to go through this route.

4. Email discovery tools: Tools such as Hunter.io provide functions to find email addresses associated with a particular domain. Though this is less commonly used, and may not always yield right results, it is an alternative for situations where a direct contact method isn’t available or doesn’t get a response.

The choice between these approaches will largely hinge on your team’s requirements, resources, and the scale of the influencer marketing campaign planned. For instance, if your brand prefers a more personalized outreach, direct social media contact could be appropriate. On the other hand, for super-scalable campaigns that need to reach large volumes of influencers across categories, platforms like Flinque, with built-in contact databases and outreach tools, may provide the efficiency and depth required.