Netflix Inc. ended its biggest year in company history with a bang, powering its stock to intraday and closing highs after adding more customers than expected and saying it no longer needs to borrow money to build its entertainment empire. The world’s leading paid streaming service attracted 8.51 million new subscribers in the final three months of the year. The pandemic has provided a huge boost to Netflix’s business, forcing people inside and limiting other entertainment options like movie theaters and concerts. The company added 25.9 million customers in the first six months of last year, and ended up adding 36.6 million customers setting a new record.