Meta , Coinbase and Block have each laid off at least 10 percent of their employees in recent months and partly blamed artificial intelligence. About 13,000 jobs were eliminated among the three companies. But the cuts also came after big changes and growing questions about their businesses. Meta backed away from its big bet on the so-called metaverse , which cost the company about $80 billion. Coinbase’s chief executive, Brian Armstrong, said that its business remained volatile and that there