Providing temporary use of online non-downloadable software for operating a marketplace for influencer and celebrity endorsements; Providing temporary use of online non-downloadable software for operating a marketplace for influencer and celebrity endorsements for tradeshows; Providing temporary use of online non-downloadable software for operating a marketplace for location-based influencer and celebrity endorsements; Providing temporary use of online non-downloadable software to facilitate endorsements, marketing campaigns and activations; Providing temporary use of online non-downloadable software for payment processing; Providing temporary use of online non-downloadable software for social and professional networking; Providing temporary use of online non-downloadable software for online marketing; Providing temporary use of online non-downloadable software for marketing campaign management; Providing temporary use of online non-downloadable software for negotiations and contracting; Providing temporary use of online non-downloadable software for workflow management; Providing temporary use of online non-downloadable software for payment processing; Providing temporary use of online non-downloadable software for data analytics