Receive badges and level your profile up. Ranks will be something like Novice-Knowledgeable-Expert... Let us know how you'd like the ranks to be called!
01827822711 my bkash receive
How will they encourage users?
Instead of ranks we can have something like "openness level" of a user from 1 to 10.
Could you open this up a bit more? Will the users have a public profile that they can customize and possibly have a link to (Like mytiki.com/u/username)
I think badges would be a great way to make people interact with Tiki more, it's a reason for the users to come back to Tiki and do "progress". One badge could be years on Tiki (Account creation date).