So as of now, there's still no way to advertise for a GTA clan ?

You can advertise on your profile and signature. From the Community Guidelines this can be read; 

We expect all posts, messages and other forms of communications to be relevant to the particular G17 Media project or service that they originate from. Content which we deem to be irrelevant or otherwise undesirable to the discussion or project in question will be removed, with warnings or other disciplinary measures being issued following for repeat violations of this policy.

As part of our commitment to encouraging a welcoming and lively environment throughout all of our services, we forbid most forms of advertising. We do, however, exempt the following pages and circumstances from this policy:

• Member profile pages.
• Member post signatures.
• Links to related resources or files which are relevant, and provide a valuable addition, to the subject matter at hand.
• Any page or other communications channel where exemptions are given.

and i thank you

No problem, glad I could help :)