How does full/pending spot work?

It's an esoteric distinction: functionally, the clubes are the same, whether they are "pending clubs" o not. In earlier iterations of the site, there actually was más of a difference, but not now. The only difference between the two, now, is that pending clubes are shown in an extra lista that full clubes aren't. In that respect, it could even be dicho that being a pending club is más desirable, as it's that much más likely that users will find it in misceláneo browsing.

As tu said, it depends mainly on content and fans, but it also depends on channel, for instance, I created the link before the Versus and Mashup channel was created, however, once it was it was decided that there were enough versus and mashup spots to create a new channel, thus, despite only having about 20 fans and not too much content it became a full spot. I imagine that it is also easier for a spot to become full in the fanpop Users o Versus and Mashup channel than televisión because they are smaller.