Letgo, the USA/Spanish shopping app for second-hand products, received $500 million in funding commitment from Naspers at an undisclosed valuation last week. Founded in 2015, Letgo raised nearly $1 billion already, the majority of which from Naspers. Letgo’s ownership is separated between the USA and Europe, but it now seems likely Naspers’ effective overall ownership exceeds 50%, alongside venture firms like Insight, Accel, Northzone and many others. Meanwhile, competitor …