Some great questions here. Let us answer them one by one.
How will I be able to let people see my community during this beta test and in the future?
Right now, communities aren’t listed anywhere. They’re invite-only and “hidden” by design to keep the test somewhat constrained. But in the future, there will be rich discovery experiences just like we have for posts and blogs on Tumblr today! We’re building this stuff as quickly as we can.
Will the cap be removed or be severely bumped up once the beta test is done?
Our hope is to remove the cap entirely. The cap exists as a kind of bottleneck to keep our experiment limited for now, and we already expanded it from 25 to 500 per community. However, the cap could come in handy for communities managed by a small number of people—or those that actually want to be small, which we’ve heard feedback about. The most likely outcome is that the cap will become optional.
If a community acts out will there be an option to report them?
Yes, we’re building moderation features for inside communities now. We are also building moderation features for communities themselves—so they can be reported the same way posts and blogs can be reported. Communities, overall, have to adhere to the same guidelines as everything and everyone else on Tumblr.
Thank you for your questions, and keep 'em coming folks.