It looks like they've been losing subscriptions to the main site, so they're looking for ways to make something off of Kari from those who won't buy into the site. This has upsides and downsides. The upside being of course that we can now simply select which sets we want to see as they are released (assuming they're still going to be releasing new sets, and not just putting old sets on the new site, as is the case for one of Kari's two sets currently available on the new site). The two sets available now are priced at $9 and $10. A monthly subscription costs $25-30 a month, and we'd be lucky to get two releases in that time-frame. So, assuming they keep up their abysmal release schedule, the new site is more cost-effective for viewing new sets.
One major downside is that they now have less incentive to (attempt to) keep to a consistent release schedule if they kill the main site, as they can just put old sets on their new site as much as they like, and focus more on their active models.