~snip~
I assume English isn't your first language but I'll try to interpret it. Let me know if you meant something else.
Users with less then 10 post can post. But the forum thread don't
This is pretty useless TBH unless the limit is significantly raised since ones like Deeponion has hired shills with high ranked accounts including some legendaries, hero members, etc. And 10 posts is ridiculously low and most account farmers already cross that threshold since they try to aim for Jr Member for all the campaigns.
OP can of cause post but the thread don't bump.
Not really worth it as the ICO managers posters themselves don't post as much as they know bumping the thread too much themselves with get them attention from the DTs and the mods and an ANN thread with a DT negged trust isn't really nice for their promotion. They use shills who get paid in ETH, BTC or other tokens.
Each user can post multible times but only bump the same thread one time.
This seems useful and neat at a glance but you need to remember that unless you make it like once per account for lifetime it'll be again endless cycle of alts since it's not like making alts is particularly hard given there's no email checks, no rules on multi accounting unless it's ban evasion of a spam/plagiarism ban