Letterists International probably invented the ideas behind free software and creative commons. They created the idea of détournement, in which existing mainstream logos and slogans were subverted for anarchist, satirical and other radical political purposes, like the picture of the Queen defaced in the cover of the Sex Pistols single.
The counterpart to détournement is recuperation, in which radical ideas are appropriated by the cultural mainstream to be re-used in safe contexts, like the use of Thunderclap Newman’s “Something in the air” to advertise an airline.
Free Software enables both of these: mainstream software made available under free software licences like the GPL can be put to radical new uses because of the terms of the GPL. But it also enables software built to political ends, and shared under those terms, to be put to mainstream uses.
If anything, open source software is a bigger enabler of recuperation. By relieving receivers of the pay-it-forward obligation, open source licences make it easier for incumbent organisations using traditional software model to make use of ideologically-motivated software publication.