[ricberw]

Do you feel like a single prompt at the start of your shopping journey would turn you off/be a blocker?

E.g. "Are you shopping today for yourself or someone else?" as an entry gate.

[theGeatZhopa]

Not at all. With some explanation "why we ask", it would be better.

On the other side, I would Welcome the possibility to mark the products "for others" while putting in the basket. Usually, it's a mix of different usages in one order.