Grumpy Old Geeks Companies Centra Tech Company Centra Tech 2 mentions in 1 episode The cryptocurrency startup whose paid celebrity promotions and founders' fraud indictment are discussed. Mentions 303: Sigh Dec 6, 2018 49:02 Both celebrities have been paid to advertise the startup Centratech and ICO. 49:54 The founders of Centratech were indicted for security fraud and wire fraud.