We have started a training clan network. That includes
a. Shared forums.
b. A new shared private IRC channel
c. We train together on each other's maps and occassionally scrim (but not match now) together.
d. Our leaders share one planning area where we discuss issues etc.
e. We each help recruit for the other in pubs.
f. Thanks to Knack we share a pub server.
Despite that we are separate clans. I cannot kick a member of their clan, though I can request it. The same is true for them. Each clan has distinct leadership who are responsible for that clan and its direction.
The leaders share common goals and such, but they may implement them differently. For instance, WSL has a similar policy as InT when it comes to behavior in a scrim. But we do not share "no scrim lists." They maintain their own.
In the end different leaders and different members may appeal to different people. This offers choices. Or to put it another way, some folks may not like M7 all that much. But they like the general InT system. They get along with flip, and want to be part of a well organized training clan, and a larger network.
WSL also has a different time window, for the most part. They are on more in the mornings, and early evening. InT has since its inception been more of an evening and late night clan.
We considered a merge for a while. But we decided that separate clans in a network was best.