Recently picked up a Ralink 7601 Wifi Adapter (a no-name clone wifi stub from Ebay), for the princely sum of about $2 delivered. It’s identifable easily because in lsusb it shows up as;
Bus 001 Device 005: ID 148f:7601 Ralink Technology, Corp.
Unfortunately, it turns out these things aren’t natively supported by Raspian without a firmware module. But there’s hope!
This guide shows how to get it running, which essentially just boils down to this command;
wget https://github.com/porjo/mt7601/raw/master/src/mcu/bin/MT7601.bin -O /lib/firmware/mt7601u.bin
And then configuring it like you normally would in wpa_supplicant. Pretty easy stuff in the end.