Do as more offers you can. There's not a rule. There's not offers available for all countries. The more referrals you have, that are active, more coins you'll have from them.
Some tips here
https://www.facebook.com/GetPaidAllyouhavetoKnow?ref=hl
I just put Thumb Up for you.
If you wanna do the same with me i appreciate. Go to my name profile and view profile, then click thumb up on my profile, thank you!!!!