their github was created 2 months later, So they were up to no good 
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They joined github at February 25, 2018 and created their announcement thread at December 23, 2017. IMO it is not enough proof to accuse them of such things because github is only used for sharing programs and source code, development can be done without it. Creating their github account at February is justifiable because it is stated in their roadmap that they have launched their Cryply core and GUI wallet at Q1 2018..