Bec Martínez-Cristillo was hours into her search for an eight-character access code.She’d scrolled through Reddit threads. She’d sorted through hundreds of TikTok and Instagram comments. She’d even considered buying a code on Depop, Gen Z’s favorite resale app, where they were priced from $5 to $100. Then, late last week, Martínez-Cristillo finally found it—a free code to Shuffles, the new collage app from PinterestCreated by Pinterest’s in-house incubator, TwoTwenty, Shuffles has become one of the most coveted apps on the internet since quietly launching this month as a closed...…Bec Martínez-Cristillo was hours into her search for an eight-character access code.She’d scrolled through Reddit threads. She’d sorted through hundreds of TikTok and Instagram comments. She’d even considered buying a code on Depop, Gen Z’s favorite resale app, where they were priced from $5 to $100. Then, late last week, Martínez-Cristillo finally found it—a free code to Shuffles, the new collage app from PinterestCreated by Pinterest’s in-house incubator, TwoTwenty, Shuffles has become one of the most coveted apps on the internet since quietly launching this month as a closed...WW…