3 UK has launched a proposition called 3 Free Agent, promising cash when people promote 3’s free prepay SIM cards. They’ll pay £5 every time someone orders a free SIM via a friend and adds a £10 top-up, with the user also benefiting from an extra £2 top-up. Registration and full details are available via a dedicated website at Freeagent.three.co.uk. [Press release]