[Metaplanet Announces BTC Cashback Payment Card for Shareholders, 1.6% of Spending Amount Will Be Returned as BTC] Deep Tide TechFlow reports, on March 25, according to official disclosures from Metaplanet, the publicly listed Japanese Bitcoin treasury company Metaplanet announced that it will launch an exclusive cashback payment card for shareholders this summer. Cardholding shareholders will receive 1.6% of each spending amount returned in the form of BTC.