Hello. 
I`ve got an expierence with theese guys http://www.informed.com.pl/forum/viewtopic.php?p=21793&highlight=
https://www.diamond-atelier.com/national-tv-appearance-soon/
http://fan.fc-anji.ru/blogs/blog/24420.html
http://www.informed.com.pl/forum/viewtopic.php?t=7245&start=0&postdays=0&postorder=asc&highlight=
https://www.gimpusers.com/forums/gimp-developer/15481-added-bitcoin-donation-option
  that were mentioned before. 
And I watned to say thanks!

MichaelVig