there isn't a single, widely recognized "Social Media Influencers Marketplace" that encompasses all influencer marketing opportunities. However, there are various platforms and resources that connect businesses and brands with social media influencers for marketing collaborations.

These platforms help streamline the process of finding, communicating, and partnering with influencers to promote products, services, or brands. Here are some notable influencer marketing platforms:

1. **Influencity**: A platform that connects brands with influencers, offering tools for influencer discovery, campaign management, and performance analytics.

2. **AspireIQ**: Formerly known as Revfluence, this platform helps brands find and collaborate with influencers Social media influencers marketplace across multiple social media platforms.

3. **IZEA**: IZEA offers a marketplace for brands and influencers to connect for sponsored content, influencer campaigns, and brand ambassadorships.

4. **Upfluence**: Upfluence provides influencer marketing software for identifying influencers, managing campaigns, and tracking performance.

5. **Traackr**: Traackr offers influencer discovery, relationship management, and performance tracking to help brands build authentic connections.

6. **Famebit by YouTube (Google)**: This platform is focused on YouTube influencers and allows brands to create campaigns for content creators to bid on.

7. **Grin**: Grin provides influencer relationship management software for finding, recruiting, and managing influencer partnerships.

8. **Takumi**: Takumi specializes in Instagram influencer marketing and provides tools for campaign creation, influencer selection, and tracking.

9. **Hypr**: Hypr offers influencer search and analytics to identify and engage with influencers across different social media platforms.

10. **Klear**: Klear provides influencer marketing solutions, including influencer search, tracking, and analytics.

11. **Heepsy**: Heepsy offers influencer search, analytics, and reporting tools for Instagram and YouTube.

12. **SocialBakers**: While known for social media analytics, SocialBakers also offers influencer discovery and collaboration features.

Remember that the influencer marketing landscape may have evolved since my last update, and new platforms may have emerged. When using influencer marketing platforms, carefully consider factors such as influencer authenticity, alignment with your brand, audience demographics, and campaign goals. Always thoroughly research and vet influencers before partnering with them.