The Cursed Apps - Hardboiled Magic, #2

What's the lifetime value of a dead customer?In a desperate bid to prevent being ousted from his own company, a startup founder accidentally draws the attention of necromancers looking to protect their secrets. Occult attention spills over from the founder to his shady investor, whose entire portfolio becomes infested as a food delivery app delivers vampires, a dating app transmigrates souls and social media influencer's video game creates literal zombie followers.
Are the apps cursed or is something even worse in play?It's tale of death and revenge set against a sardonic landscape of tech startups and venture capital as Mister Lewis tries to prevent metaphysically weaponized greed from burning down the world.