Halle, Belgium, 2017-Mar-23 — /EPR Retail News/ — Today ( March 20, 2017), Colruyt Group launched the Xtra loyalty card. This is a single loyalty card which, from April 4th, can be used by a massive 3.7 million customers in over 600 shops and collection points comprising Colruyt, OKay, Bio-Planet, Spar Colruyt Group, Collect&Go, Dreamland, Dreambaby…