Indeed, you are limited to 5 topics: we limit the initial number for two main reasons.

First, we want to avoid cybersquatting (people who would create many topics without curating them and wasting a topic name/url).

Second, we, at Scoop.it, value more quality than quantity. Keeping updated 5 topics at the same time isn’t that easy.

Note:
Using Scoop.it Pro? You can create 10 different topics.
Using Scoop.it Business? You can create 15 different topics.
Using Scoop.it Edu? You can create 20 different topics.