Julian De Freitas, Zeliha Oğuz-Uğuralp, Ahmet Kaan Uğuralp · 2025 · HBS Working Paper; arXiv Read the source In 37% of farewells, companion apps replied with one of six manipulative tactics — such as guilt or fear of missing out — raising continued engagement up to 14 times — through curiosity and anger, not enjoyment. Questions it bears on Which safeguards work