Is there any way to earn dealjoy tokens by doing some kind of marketing for you?

By participating in Bounty campaing for example Wink

Is the bounty campaign still active? can someone share the link?

Bounty campaign is still going on, here is the link https://bitcointalk.org/index.php?topic=4631237

How long a bounty campaign last?

Most likely until the end of the ICO.

It make sense, it's like standard procedure for most of the projects.