Never heard of them myself and not sure whether this partnership has been announced anywhere else before today:

https://www.cardiffcityfc.co.uk/news...p-with-k8.com/

K8.com promises matchday competitions over the course of this season with the opportunity to win tickets, hospitality and ‘money can’t buy’ Cardiff City experiences. The report says there will be betting booths around the stadium for fans to have a matchday flutter, as well as great exclusive K8.com odds and promotions for Bluebirds supporters to enjoy.

Apparently they're an online network of casino and gambling companies based in Manila in the Philippines with over 15 million users and offices in almost 50 countries including the UK, The Philippines and Vietnam. It seems City will be in good company as K8 promotes itself by its sponsorship of UK premier league teams, West Bromwich Albion, Manchester City and FC Schalke.

You may have seen K8's logo on West Brom's shirts yesterday - lot of Chinese type writing.

I assume this will not be replacing 'Visit Malaysia' on Bluebirds shirts?