I believe that you can participate in the bounty. Read the rules on the first page of the forum. You have already 10 Merit -  so you can.

" Rules

1. This event starts from July 1, 2018 until December 23, 2018; you can joint at any time.
3. Participant requirements:
        - Your bitcointalk account must be registered before June 25, 2018;
        - Your bitcointalk account must have 10+ merits;
        - You need to follow @semuxproject on Twitter;
        - You need to increase you posts count by 1 per week;
        - No spam/multi-account.
4. The rewards will be distributed to participants based on their merit scores:
        - The reward allocation is 20,000 SEM per week;
        - Payments are processed on Sunday.
5. We reserve the right to modify or cancel this event at any time. We reserve the right to refuse participants for any reason."