Etsy A/B Tests And Implements Required Field Labels
Here is a very tiny a/b test from Etsy - the marking of two product personalization fields as required using red asterisks. If I had to guess, I'd expect the effect on checkouts was probably very small if any (based on the pattern data so far). Perhaps this change decreased the error rates? Either way, it now looks like the change (B) was also rolled out, so there might have been some good from it.
Highlighted UI Changes From This Leak
Red Asterisks As Required Fields
Two personalization fields have been marked as required using red asterisks.