[cehrnrooth]

Assuming the marginal cost of printing an extra card is fairly small, have you considered sending a copy of the card to the sender?

Unless the recipient provides some sort of feedback the sender doesn't really get anything to show for it. This could also let the sender see the quality of product sent. You could limit it to just the first card sent to limit your cost increase.

[gfodor]

This is a pretty cool idea. I had considered it but not deeply enough in that it would likely increase the rate at which customers ended up returning which is the key metric. I might give it a shot, since it's easy.

The only reason I'm skeptical is that I'm already contacting people after a few days to follow up with them how their order went, so I'm unsure how much more upside there is to interacting with senders more post-free card.

The other two problems is you've now doubled your acquisition cost so it'd need to at least double your return rate to be worthwhile. Also you'd need to get people to enter their own address which will reduce your top-funnel conversion rate, but this isn't really a huge deal in the long run if you assume you can drive users cheaply to the app.

[mhb]

Probably doesn't work with the workflow, but you could send an electronic image of the postcard that was sent to the sender instead of a physical copy.

[cehrnrooth]

Additional thought, you could put a unique promo code on the senders copy (code tied to their account) where if they buy X credits they get Z free.

[gfodor]

Yeah good idea! Right now recipients of cards have a code they can punch in to buy credits for who ever sent the card. If I send a free card to the sender also I could tweak this logic easily.