Audriusa 
The Creative Commons license, used by WikiHow, allows me to grant permission to use my contributions for commercial purposes. Being strong supporter of the GNU philosophy, I grant this permission to anybody who manages to tell apart my part of the contribution to any WikiHow article. In many cases this is rather easy to do using the editing history.
Also, I grant permission to use these contributions under GFDL license, if somebody would need this.
Audrius.
