rugk@jomo @rugk of you want a detailed look: read the paper (it's not explained on the website)
Otherwise: they just use other methods than images, posting forms e.g. works
Jonkman Microblog is a social network, courtesy of SOBAC Microcomputer Services. It runs on GNU social, version 1.2.0-beta5, available under the GNU Affero General Public License.
All Jonkman Microblog content and data are available under the Creative Commons Attribution 3.0 license.