If you want to bid on eBay (Nasdaq: EBAY) bargains next summer, you may want a quick click finger, a good read on the seller you'll be buying from, and a PayPal account.

Come July, eBay will no longer support third-party checkout solutions. Hit the road, Google (Nasdaq: GOOG) Checkout and whatever American Express (NYSE: AXP), Visa (NYSE: V), or MasterCard (NYSE: MA) may have up their sleeves in this growing niche. If Latin America's MercadoLibre (Nasdaq: MELI) ever wants to make a stateside splash with its MercadoPago platform, it will have to forgo a nudge from minority investor eBay.

Is eBay being greedy, brilliant, or both? Yes, yes, and oh yeah.

The online giant claims that the move will help provide speed and consistency to the checkout process. It will also make it easier to support mobile platforms. eBay points out that less than 10% of eBay.com transactions are being processed through third-party options, so it may even make sense to move everyone over to the PayPal mother ship.

Unfortunately, this is also the kind of move that will make eBay bashers -- and they're out there, just check the comment box below in a few days -- even angrier at the online marketplace. It doesn't matter that PayPal rocks. Despite bellyaching over transaction fees, PayPal has been growing a lot faster than eBay's marketplace business in recent years. Payment volume grows briskly, and PayPal tacks on a million new accounts every passing month.

It may have been a product of eBay's success early on -- when PayPal thrived against the Billpoint option that eBay launched in cahoots with Wells Fargo (NYSE: WFC) -- but it has been running on its own for years. PayPal doesn't need exclusivity on eBay to matter. It has been growing its merchant services business at a better than 40% year-over-year clip in each of the past three quarters. If eBay.com should ever succumb to free online classifieds, social networking apps, or cheaper niche auction platforms, PayPal will surely live on.

Still, officially removing support for third-party solutions will make it that much easier for PayPal to continue to dominate this space.

Well played, eBay. Let's hope that the Web-savvy consumer doesn't bite back.

Is eBay right to nix support for third-party checkout solutions? Share your thoughts in the comment box below.

American Express and Google are Motley Fool Inside Value recommendations. Google and MercadoLibre are Motley Fool Rule Breakers picks. eBay is a Motley Fool Stock Advisor recommendation. Motley Fool Options has recommended a bull call spread position on eBay. The Fool owns shares of Google. Try any of our Foolish newsletter services free for 30 days. True to its name, The Motley Fool is made up of a motley assortment of writers and analysts, each with a unique perspective; sometimes we agree, sometimes we disagree, but we all believe in the power of learning from each other through our Foolish community.

Longtime Fool contributor Rick Munarriz is a satisfied eBay user with 178 positive feedbacks to show for it. He does not own shares in any of the companies in this story. He is also a member of the Rule Breakers analytical team, seeking out the next great growth stock early in its defiance. The Fool has a disclosure policy.