There's been at least one experiment that involved giving an income for an extended period of time as well, unfortunately I can't remember where I read about it. Their results were at least in the short term similar: Some "abuse" (to the extent you can call it that when the money were given with no strings), but also a number of people who leveraged their "free income" into building businesses.
Maybe you're thinking of one of the experiments implementing the basic income guarantee idea [1]. The Wikipedia page mentions successful but limited experiments in Canada and India among others. It's also an interesting approach, but I think more as a way to redefine the meaning of work in developed countries. The burden of having to make a living becomes the freedom of contributing what you want and enjoy doing (or getting a high salary for doing what you don't enjoy, as you choose), a great philosophical shift...
