For Ethernet applications, you often need a lot of 49.9Ω resistors. Due to the assembly costs, it’s often more cost-effective to use resistor networks instead of multiple individual resistors.
LCSC has a cheap 1% array of 4 independent resistors priced at 0.0082€/pc @1kpc: 4D03WGF499JT5E
Mouser’s 1% arrays of 4 independent resistors are priced at 0,017€/pc @1kpc and therefore more than 2x the price of LCSC: CAY16-49R9F4LF
However, Mouser offers free shipping to Germany whereas LCSC’s shipping is always around 37€ using DHL express.