If your wordpress theme uploaded into WordPress.org theme directory without fulfilling key rules, among other GPL compatible and no spammy links, it could had been possibly removed without prior notice.

First got to know this via ProBlogNews , 200 themes that not comply with these rules were removed by WordPress on Dec 12. There are further discussion by Justin, spectacu, alistercameron.

I’m not a theme coder (tried once but not impressed with the outcome), but this action can be interpreted by many as ‘punishing without giving chance to defend’ . It needs little bit more tolerant to allow them to comply with the new rules, and Matt & WordPress won’t get unnecessary bad publicity publicly.

Like everybody else (who are not good in theme design), I love theme, especially ‘premium‘ theme that not only looks great, but some of them is extremely customizable and feature rich.

Those persons above has got a great articles about the issue, and you’re recommend to read it especially if you’re theme coder. I’m summarizing what I

Back Link

There are 2 type of links that if available on theme, the theme will not be accepted.

The first type obviously spammy links. I don’t agree with the way of certain theme coder putting a links on the theme that linking back to non-author website  as SEO purpose. I just feels that it is unethical and opportunistic which taking advantage of WordPress’s popularity.

The second type is the links on the theme that linking back to commercial site that selling themes. Can this be interpreted that WordPress doesn’t like those that selling theme especially that branded as Premium theme??

GNU

Another crucial part here is how WordPress enforcing the usage of GPL. Again, I’m quite new to this term although have heard of it many times before.

You have probably came across about it before where certain themes are free to be use but restricted for any modification without prior permission. This is against the spirit of  GPL which clearly stating,

the freedom to use the software for any purpose,

the freedom to change the software to suit your needs,

the freedom to share the software with your friends and neighbors, and

the freedom to share the changes you make.

When a program offers users all of these freedoms, we call it free software.

You’re probably safe if avoiding  these stuff and. Spend some time to read the theme’s about page before uploding any theme.