I'm not entirely sure who the market for this product is. People who are desperate to have sex but aren't desperate enough to either walk to a convenience store or forgo protection?
I'm willing to bet that they diversify into other stuff pretty swiftly when their core product fails to get market... penetration.
I think the 1-for-1 charitable side to this covers for the business equation because, I agree, it seems like a small market when you look only at the delivery aspect.
"It feels like you're stalling for time. Who's that at the door?"
"Oh, err, someone looking for a different address, don't worry about it."
Unless maybe you ordered discretely via app/text and it was delivered to your letterbox by the time you got home from a date or night out.
Where I live all the local takeaways use the same website to sell online. You could easily see consolidation of delivery to a single company that then offers extras to the order. It could make takeaway more like room service in a hotel.
I'm willing to bet that they diversify into other stuff pretty swiftly when their core product fails to get market... penetration.