AdWords Coupons

Okay, so I have a complete website and I've setup tons of landing pages via Unbounce.

I want to roll-out the AdWords campaign, and I'm considering purchasing the AdWords coupons off of Fiverr. Is this a stupid move?

My plan is to spend $5 for the coupons, create 15 accounts, spend $25 on each account, and get the free $100 credit.

In effect spending $380 for $1875 of AdWords dollars. Is this going to work or am I wasting my time? Can I use the same credit card and contact information each time I setup a new account? What would you suggest

not related to this suggesstion..
but you can buy those coupon from me too

It would probably work unless your landing pages are linked to the ads in multiple accounts.

yes, this method works good

I have also question about this.
Is it enough to have different pages like domain./page-1, domain./page-2 etc. or I need new landing domains?