Actually there is no limit for your activity. I can be a very good example of this situation here. I got a lot more activity than required but I don't have any merits so I'm stuck in here. But I didn't stop. I'm continuously being active in this forum.
You've made some interesting posts, and I gave you a merit for this one.
https://bitcointalk.org/index.php?topic=4436761.msg40703341#msg40703341I don't think your problem is post quality, but posting the 1,000th comment in a mega thread is probably not going to get you any exposure.