The name Abaddon means "destruction". This name is used as a proper name to designate the exterminating angel in the Apocalypse
Yes there are, it is used to test possible new functionality of the bot and to report possible bugs, to participate you just have to join the support server and make your request to a member of the staff.
The "contributor" role is attributed to the people who helped the development of the bot via these four means: - Top 10 of the ranking of votes on top.gg. - Added the bot on several servers (without cheating). - Having found several bugs on the bot. - Having made several suggestions which have been added.
It will give you the role of "Donor" as well as "Beta tester" on the server and access to the beta features of the bot. Your suggestions and requests for bot support will take priority, after which it will also give you VIP access to the bot. All of this money will be used to help pay for the hosting server.