If it weren't for the ability to buy and sell online, would international merchant account providers even exist? I doubt it. Ecommerce merchants are a different breed of sellers for many reasons. They have more options in selling. They have more choices in accepting payments. They are on the forefront of the cutting edge industry and can innovate techniques as much as they can. Above all, they may act as an extension of an already existing brick and mortar store, and thus are able to enhance the consumers' buying experience.
When it comes to expansion, nothing is more beneficial than establishing your business with an international merchant account provider. Without it, it may be impossible to expand your consumer base overseas. Of course there are alternatives but this is the best and most convenient way to do it.
Expanding your consumer base internationally means you would have to create a bigger product catalog, perhaps acquire more ecommerce domains, hire additional customer service staff, or process larger volume of payments. Most international merchant account providers can offer services for any of these needs. All you have to do is research and decide which provider is best for your business.