Are there any creator content marketplaces that focus on social-ready assets for ecommerce ads?

Yes — a few creator-content marketplaces are specifically geared toward social-ready assets for ecommerce ads (UGC-style photos/videos, hooks, short-form ads, and reusable creative). The landscape usually falls into two buckets: UGC creator marketplaces and ad-asset/creative production platforms.

Good fits to look at

1) UGC-focused creator marketplaces

These connect you with creators who make ad-ready content for TikTok, Meta, Reels, Shorts, and PDPs.

• Insense
  Strong for ecommerce brands needing creator-made UGC for paid social. Supports briefs, sourcing creators, and content usage rights.

• Billo
  Built for short-form UGC ads. Popular with brands that want fast-turnaround video assets for Meta/TikTok.

• Trend
  UGC marketplace with creator matching and paid-social-friendly deliverables.

• Bounty
  Often used for creator content that can be repurposed into ad creative.

• Collabstr
  Creator marketplace with more flexibility; you can source UGC creators and influencers, though it’s less “ads-first” than some others.

• Flockler / Aspire / GRIN / Tagger
  More influencer/creator management platforms than pure marketplaces, but useful if you want sourcing plus workflow and rights management.

2) Creative/ad asset marketplaces

These focus more on performance creative than raw creator sourcing.

• Motion / MNTN-style creative tools
  Some platforms help organize, test, or generate ad variations rather than supply creators directly.

• Pencil / AdCreative.ai
  More for generating ad creative variations from existing assets. Not creator marketplaces, but useful for “social-ready” output.

If your goal is specifically ecommerce ads, prioritize platforms that offer:

• Vertical video formats
• Raw footage + edited cuts
• Usage rights for paid media
• Whitelisting / Spark Ads support
• Fast turnaround
• Creator diversity for testing hooks and angles
• Direct response briefs rather than influencer-only deliverables

Best practical options by use case

• Fast UGC for paid social: Billo, Insense
• Broader creator sourcing + workflow: Aspire, GRIN, Tagger
• Simpler marketplace for one-off creators: Collabstr
• Creative iteration/testing on top of assets: AdCreative.ai, Pencil

If you want, I can also give you a shortlist by budget, by platform (TikTok vs Meta), or a comparison table of the top 5 options.