Yes, Entropay works. I dont think there's inner trick.
E works, yes.
What I am saying is that if you do not know the "inner trick", then with E card account will get suspended due to billing issue, soon.
If you know the "inner trick" then account will not get suspended due to billing issue.
Let me give you a hint : Do you know that after adding any card, there is a test charge NOT only while adding a card, there are test charges later as well at random. So, let us suppose you have a card with $1 balance. You add it : test charge success, card added. Test charge amount is refunded after some days, but after adding card, after few hours or next day, another random test charge. But, jeez, the card just had $1, so next test charged failed, account suspended !!!
So, do not say that there are no "inner tricks" or "inner knowledge"
You need to think OUT OF THE BOX : possibilities in everything are ENDLESS.
There are lots of "inner tricks and knowledge" about Adwords.
And, how do I know all that ?
My cousin here in India, works for the (GLOBAL) team of Adwords that does accounts reviews. This team (or set of teams) review accoutns of all countries.
My friend, think out of the box. And do not reject any possibilities, please.