With cutting off new profiles from easy access to basic features it should demotivate some of the people who like to spam links or participate in bounty campaigns.
I doubt that. They'll just create more accounts to continue spamming.
I don't think theymos will impose more Newbie restrictions:
Limiting newbie participation is very harmful for a community. Newbie jail will never return: I consider the newbie-jail period to have been extremely damaging to the forum. When barriers to participation are too high, then the best people often just won't go to the trouble of joining, and the people who are willing to jump through the hoops are often people who aren't good for the community: people with nothing better to do, scammers, get-rick-quickers, etc. Having a permanent newbie jail policy would improve things a lot in the short-term, but would end up being a fatal poison to the community.