Here are some organic, cost-effective ways to market your global task marketplace and acquire your first 100 customers:

Identify your ideal early adopters and reach out directly - Find people and businesses that would highly benefit from your offering and reach out directly via email or social media. Offer discounts or free trials in exchange for feedback.

Leverage your personal and professional network. Tell everyone you know about your new marketplace. Offer them special deals for signing up early and referring others.

Guest posts on relevant blogs and publications: Write and distribute guest posts explaining the benefits of your marketplace to niche publications related to business, travel, e-commerce, remote work, etc. Include a strong CTA to check out your site.

Run giveaways and contests. Offer free credits or monetary prizes through gleam-based contests in exchange for social shares, email signups, app downloads, etc. Promote these widely through social media.

Attend relevant conferences and events - Have a booth, network and promote your marketplace at conferences related to your target customers, like global business summits, travel influencer events, etc. Offer special sign-up deals.

Leverage Facebook groups and LinkedIn: Join and engage with highly targeted Facebook groups and LinkedIn forums related to your offerings. Carefully mention your new marketplace when relevant, without overt self-promotion.

Produce useful, shareable content. Create content like guides on hiring remote assistants worldwide or comparing global e-commerce shipping prices. Promote this content through social media, driving referral traffic to your site.

I hope these organic growth strategies give you some ideas to kickstart acquiring your first set of customers cost-effectively! Let me know if you need any other specifics.