I hope this can be modified! but just so you guys know they changed the diamond and energy system there. 250 diamonds per 1 ad every one hour, 10 ads limited each day so if ur patient to check ur phone and collect diamonds u can get 2,500 diamonds everyday! And as for the energy system it filled up by itself every 1 hour, but u can also get 20 energies every 30min by watching ads, no limitations. I contacted the dev and they made changes and adjustmens for invitation rewards either so many good stuffs and it's so easy to play for free.
I hope you can support them still ?