I tried to do some offers, not this one tho but some that offered +30 tokens like installing and achieving different goals on others games like Lords Mobile.

After completing what was requested I did not get a single token as reward, its safe to say I got scammed.

I even contacted support and they asked me to send them a proof like I completed the offers, i screenshoted, also the achievements appear in the Google Games profile and can't be cheated, even after all this not a single token was rewarded to me.