Originally Posted by DELLAS
If they are ok with all that then there is nothing to stop them booking flights for you with their miles. Based on that it may or may not be worth it.
But if they go through all the trouble to sign up with Aegean, why not let them also use the miles to book tickets for themselves? ;-) Or alternatively recommend them another card that earns them points that might be useful for other purposes
Visits this year: AMS, ATH, BRU, BRS, LHR, LGW, CDG, FCO, VCE, MUC, VIE, ZRH, GVA, ATL, GRU, LIM, PTY, SJO, ASU.