Good question for the  home warranty marketing rep to answer.

Home warranties typically cover systems that are not covered by homeowner's insurance such as repair to the heating system, appliances, etc. In Oregon, a request for a home warranty is written into the purchase agreement and payment for this is open to negotiation between the buyer and the seller. Often agents will purchase these as a generous closing gift for their buyer.

As little as they can get away with.

Depends on the warranty.  Typically, there are basic, standard and over-the-top warrranties that cover different stuff.

And how is it paid??  Usually with a check, or credit card.

Depends on the warranty company. 

Different warranty companies offer different coverage. Check with those companies that offer warranties in your area. And, here in NC & SC, they are paid from seller proceeds at Closing.

Read the policy.

The working systems of a house but every warranty is structured slightly different and the cost varies. The seller or buyer or anyone else can pay for it and that usually happens at closing.

Every company offers different coverage if you read the contracts. The cost can be covered by the buye, seller, or even an agent!

What they say it covers and what it actually will pay for i completely different in most cases. I have not seen one worth its weight in paper. 

No different than anything else.  Look at the plans and read the fine print.

Who pays is negotiated. 

https://www.hmsnational.com/homeowner/about-home-warranties#what-is-covered

Depends on the company.  Read the product brochures.  It's usually paid by the seller for the first year and can be renewed by the buyer after that.

Lynnea Miller has this one. The buyer or seller can pay for it. A homeowner can buy one as well.

It depends on the company and the plan you choose. 

Lynnea and Alan gave answers that I like....

Yes, great answers and I won't be surprised, if it will be asked again.

A lot of great answers here. 

Agree.

On the site for each warranty company, they usually offer a few different plans explaining what they cover and how much.

there is a brochure on the orhp.com web site. 

An owner can buy for their home or a seller can buy for the buyers when they sell.

Typically home warranties try to pay as little as possible for claims. You have a $60-75 copay for each visit, even if they tell you its not covered. 

Usually major appliances, but read the fine print. There is a lot they don't cover and may required an additional rider. The seller or buyer can purchase the home warranty.

Depends 

Richard Weeks nailed this one!

Different companies with different plans have different coverages. Check their sites.

Many good responses.

Read the fine print.

At closing.  Negotiable whether Buyer or Seller pays.

They can be selected off of a menu, or you can buy a basic package that covers most systems (HVAC, electrical, plumbing, appliances) and possibility a few others. That is the one we typically offer to clients. 

Depends on what services are purchased. Paid with cash or credit card typically 

It really depends on what is bought

Read the fine print.

You've received some good answers. Keep in mind different warranties cover different things... I pay  for mine by credit card.