It appears to be some opt in program called DevShare. Here's a link to the filezilla forums where the dev team appears to be justifying its use: https://forum.

It appears to be some opt in program called DevShare. Here's a link to the filezilla forums where the dev team appears to be justifying its use: https://forum.filezilla-project.org/viewtopic.php?f=2&t=30240 https://forum.filezilla-project.org/viewtopic.php?f=2&t=3024... http://sourceforge.net/blog/today-we-offer-devshare-beta-a-sustainable-way-to-fund-open-source-software/ http://sourceforge.net/blog/today-we-offer-devshare-beta-a-s... http://sourceforge.net/devshare/why http://sourceforge.net/devshare/why