I was searching on craft supplies and bumped into litterarily thousands of molds made for polyclay, resin etc. About 1/3 of the molds were even pictured with commersically sold jewelry parts where the mold was cast on.

I am really puzzled here. Why does Etsy allow selling molds out of someone elses designs? There are so many sold here that there must be a reason for this.

I even started to doubt myself as there were so many of them - asked friends from USA if it is ok to mold buttons, findings etc. and then sell the moulds. All said that this is prohibbed by copyright laws.