Providing temporary use of non-downloadable software for internet-based dating, social introduction, social networking, and friend-finding; providing temporary use of non-downloadable software for creating, posting, discovering, and responding to activity-based social and dating invitations; software as a service (SaaS) featuring online platforms for user profile creation and management, uploading and sharing of digital photographs and media, and algorithmic discovery and connection features for social networking and dating purposes; computer services, namely, providing hosted online web facilities and computer server hosting services enabling registered users to organize and participate in activity-based social events and dating engagements; providing an online platform enabling users to promote and increase the visibility of their activity-based invitations in online discovery feeds and map-based browsing interfaces; providing an online platform featuring algorithmic recommendation technology for connecting users based on shared social and dating activity invitations, event type, venue, and geographic location; providing an online platform featuring a map-based and feed-based discovery interface for browsing and responding to user-created activity-based date invitations; providing an online platform featuring user reliability and attendance reputation scoring technology, namely, computing and displaying attendance-based reliability ratings for users based on their history of confirmed event participation and cancellation behavior; providing an online platform enabling users to activate timed promotional visibility enhancements for their activity-based date invitations, featuring priority placement in discovery feeds and enhanced geographic map display; providing an online platform enabling users to signal priority interest in activity-based date invitations, featuring request prioritization and queue elevation functionality; providing identity verification services, namely, processing digital photographs using artificial intelligence and machine learning technology to verify the authenticity of user profile photos.