Hmm let's see...
<table class="vis"><tbody><tr class="r2"><td>
</td> <td>
WillworK</td> <td>Left</td> <td>06th July 2012 - 08:13</td> <td>271,987</td> </tr> <tr class="r1"> <td>
</td> <td>
demona008</td> <td>Left</td> <td>06th July 2012 - 08:13</td> <td>263,468</td> </tr> <tr class="r2"> <td>
</td> <td>
OPTION C</td> <td>Left</td> <td>06th July 2012 - 02:13</td> <td>792,321</td> </tr> <tr class="r1"> <td>
</td> <td>
Ice Cold</td> <td>Left</td> <td>06th July 2012 - 02:13</td> <td>1,346,827</td></tr></tbody></table>
The tribe was disbanded July 7th at around 12:13 AM, so four of the 6 ISDC members left before the tribe was disbanded. I'd say that was probably a deciding factor of the deletion of the tribe, seeing as Ice Cold was the prominent leader (Smashnasty was not around, his co's were not as vocal as he, etc.... Ice was the one planning ops and whatnot).
I as well was not around, I was on vacation with an account sitter, but based on the information I could dig up, ...