The picture below figures out how it works (REMEMBER: You need to be registered first)
So after a confirmed registration (click HERE to register if not yet done; it is a MS Excel Temlplate and just follow instructions from the READ_ME sheet), you can simply buy ECUs Packs as following:
Email to EcusPacks@NGYX.IC. Which / How Many Packs. + Your registration ID.
Pay the corresponding cost at IBAN: BE63 7506 5746 0708 BIC: AXABBE22 (info: your registration ID ).
Remark: ECUs are for right now ONLY dedicated to HIV1 3XL Diag tool. But this may be extended to other services/products. Note that the more you buy, the bigger is the disount (up to 50%).