Which idea would you kill? I will not promote

I've spent way too much time thinking about these and I think I need outside opinions before I waste time building either 😂 A) Marketplace for ready-to-run programs that spaces can book. Coworking/coliving/malls/hotels/serviced residences/campuses/companies/etc. → browse → book a workshop, wellness session, team activity, class, talk, experience, etc for audience/member/guest entertainment/activities to increase footfall, increase customer engagement, customer spend, draw in new customers, increase brand awareness. B) Marketplace for audience placements. Businesses → browse → buy sponsorships in community events, Discord/tg/whatsapp community shoutouts, giveaways, later expanding to advertorials, listicles, native placements in digital media, newsletters, podcasts etc. My thinking: Both sides have disintermediation possibilities. But which one has more natural market demand and recurring purchase? Which one has the hidden landmine I'm not seeing? I'm particularly worried about: getting customers getting enough supply margins repeat purchases people going around the marketplace after the first transaction becoming a glorified agency/concierge whether there's actually enough urgency to make people pay Which would you pursue because the juice is worth the squeeze