However I don't think theymos will allowed to remain any loopholes( like copper members can post any url) if he decided to restrict putting links with posting for newbies.
In what case would a newbie have to post a link? Exactly, in the cases I noted, or similar cases. In those cases, the newbie is profiting from it and so a copper membership shouldn't be too much of a problem for them. If it is, they should let someone else post it for them or use unclickable links.
For regular posts, I believe one can just use unclickable links... It's really not all that bad as you portray it to be.
For copper members posting phising/malware links, well... It'd cost them money to get Copper Membership and then they get banned for posting Phishing/Malware links. Would people do that? Probably not. Making a newbie account is free and very fast. The requirement of buying copper membership signficantly reduces the ease of getting people to follow your Phishing/Malware links. Therefore, I don't feel like Copper members being able to post all URLs should be seen as a loophole.
In contrast to what you said, I think this will actually solve the problem! If not entirely, then at least partially, as it would undoubtedly reduce it.