So many companies have come and gone in the "print on demand" space. The barriers to entry are low and the market, while shrinking, is still quite large... If you consider the market those that send stationary (cards, letters, etc.). Having started a company in the space (engreet.com, since renamed https://www.thegreetingcardshop.com by its new owners), the fallacy is that most folks that send offline won't make the jump to digital. It's a different demographic that is slowly dying (sadly). From cardstore.com to Minted, there's still a market out there, but it's a fraction of the offline spend.
