With the videos , on mobile yes you have to sit and tap , for six videos then close the app for another six till you get the 75 to give you 150.
in the past certain competitive clubs who want to win at all cost used some kind of programme to enable them to gather thousands of credits via an automated system. Thank goodness wgt stopped this, but no doubt some clever spark will find another loophole to skirt around the rules to their own benefit.