Y Combinator has been Silicon Valley’s pre-eminent start-up incubator for 20 years. But the organisation that helped launch Airbnb and Reddit only hired its first full-time lobbyist in 2023.These days, Big Tech companies are constantly fighting lawsuits and regulators over complaints of anti-competitive behaviour. But when Luther Lowe started calling foul over Google’s treatment of rivals in its search results in the early 2010s, Silicon Valley’s giants seemed invincible.An activist at college w...