BC has been one of the first supporters of Avro during its early stages. It is still listed in our partner sites
http://www.banglacricket.com/html/footer/partners.php. Mehdi Hasan did sign up in BC as well during that time.
Mostafa Jabbar is a thief. চোরের বড় গলা মানায় না। This is guy has no clue about Bangla and technology. His sole contribution that I can think of is the Bijoy keyboard layout. Rest is stolen from different places. He should just keep his mouth shut.
As far as other means of support (banner), let us think about it.