Not exactly 6 weeks but it will take minimum of 4 weeks and couple of days to reach Jr. Member. After your 4 weeks are completed, you should be getting 2 more points to reach 30+ and you will be updated to Jr. Member.

Not bad for sure. BitcoinTalk forum is taking really good steps to keep check on the spammers and they have succeeded to a great extent. That is the reason this forum is a de facto standard for any upcoming ICOs. Without restrictions or checks this would have become another heaven for spammers.