Tier, the European e-scooter rentals startup that operates in 55 cities across 11 countries, has topped up its funding for the second time in four months. The Berlin-based company has extended its Series B round to over $100 million, up from $60 million disclosed in October. The additional capital is a mix of equity and debt financing provided by Moscow’s RTP Global, London’s Novator, and an unnamed U.S.