Since you specified Keurig 2.0 you probably already know this, but just to clarify any confusion...
When Keurig introduced their first machine it was immensely successful, and like all the printer companies do on proprietary ink cartridges, Keurig made a killing on their consumable proprietary K-cup coffee cartridges. As soon as the original patent expired, other companies started making generic knock-off K-cups and people could now avoid the expensive proprietary K-cups, even buy reusable K-cup knockoffs and use their own coffee.
Keurig anticipated this, and they introduced the Keurig 2.0 with an important new "feature" they didn't say much about which prevented the machine from brewing coffee unless a genuine K-cup 2.0 cup was inserted. With that one engineering change to the new coffee machine, all the knock-offs and reusable cups that work fine in the older machine would be useless in the new machines until the patents expire on the 2.0 k-cup technology.
Keurig was back on top in a position to dominate the market again either through proprietary K-cup products they directly manufactured or they could license the K-cup 2.0 "technology" to other manufacturers and still get a nice little piece of every sale.
The way it all happened kind of pissed some people off, but by the time they found out, most people had already bought the 2.0 coffee machine and used all the sample coffee that came with it. Perhaps even purchased a pack of old style k-cups or 3rd party knock-offs that wouldn't brew in their new machine. So for Keurig 2.0 owners there was really no going back.
A lot of buzz arose on the internet about how to get around this and some ideas for workarounds began to be posted on youtube and social media.
The first wave was mostly DIY Keurig owners started looking for answers and workarounds. Some people suggested Keurig must be using Digital Rights Management technology in their cups (similar to inkjet print cartridges). You can find youtube videos of people who recommend cutting the top off a geniuine K-cup 2.0 and taping or gluing it over and over again on top of each knock-off K-cup you use to brew coffee.
Keurig quietly watched all this and was probably amused since most people aren't going to jump through all these nasty hoops for a cup of coffee.
More recently some manufacturers who were hurt by the Keurig 2.0 move began to study the problem and seem to have zeroed in on a lower tech solution. They guessed maybe it's a special pattern in the printing on the cap of a K-cup that could be replicated somehow without violating Keurig's patents or copyrights.
And so some knock-off companies now include a little reusable clip you place on top of their k-cup cartridges which they promise will make their knock-off products work with the Keurig 2.0 coffee maker.
I don't have a solution for you and I have avoided buying a Keurig so far because v2.0 came out just when I was seriously considering getting one and I don't like the idea of expensive proprietary coffee cups. But hopefully this sheds some light on what the issues are with the Keurig v2.0.
The good news is a lot of people and companies are working on how to defeat the Keurig proprietary technology. It's probably just a matter of time until they "jail break" the Keurig 2.0 machine with some useful and sanitary workaround that most people are willing to do. May have already done this since I stopped paying close attention when I decided I didn't want a Keurig coffee machine.
Bottom line from my observation is that Pholynyk nailed it:
"If you Google 'Keurig 2.0 hack' you will find lots of information. Some of it may be useful... Grin"
So the message here is YES there appear to be several approaches you can follow to get around the Keurig 2.0 issue. The cheap and easy knock-off products worked really well for the older coffee machine and so the form-fit-function of knock off cups is well established. But Keurig thew a technology curve ball on the 2.0 machine to prevent people from using the 3rd party k-cups.
The answer is out there or soon will be, but you need to do your research and pursue the solutions that make sense to you.
As always... take everything you read on the internet with a grain of salt, and of course remember that you are reading this post on the internet.