Guys can somebody explain me why tenx gained +xxx% last days? I thought we earn rewards only from the new pay token? So why people still buying the old (useless?) one?

Here is my guess as to the recent price increase:
https://www.newsbtc.com/2019/01/19/crypto-market-wrap-tenx-surging-on-reissued-pay-credit-cards/However, down almost 10% in the last 24 hours, this project interest me cause I would like to have a crypto credit card to make payments
My only concern is that if holders earn rewards from the new tokens, what is the point in buying the old ones?
Will be checking back periodically to see if anyone received their new credit cards.