[twitter-dev] question regarding promoted apps

[wael orabi]

Dear twitter dev.
anyone knows how to add an app to this little gray box on twitter main page?
is it paid or random?
any info would be appreciated.
another thing I would love to hear some feedback on an app I developed, it
is still in beta but any feedback would be great here is the URL
http://mutweeps.com
thanks
--w43L