the only way somethings going to gain attention especially in this sense is to have data to show it's effective. Is there a large number of folks putting the tag to use, how many clicks is it generating for people using the tag, what's the percentage of people not only engaging with the tag but also clicking through to tapas itself.
it's not to seem harsh but one thing is that as much as tapas does care for it's community their also going to put their focus on things with proven rates of success, meaning if it might not be worth the risk or investment it'll probably fall on the back burner.
an upside though is that it gives us as a community an opportunity to put in the time and effort to promote it and spread it around. let folks not only here on the forums but on the tapas main site know about it. get more than just creators talking too but find ways to include the reader base (have them talking about their favorite comics, what their reading or scenes/moments in certain series that are really grabbing their attention). the more it's spread around and the more there is evidence that it's a good tag with good numbers attached to it the better a chance it has as gaining attention of those in and out of tapas, getting them onto the site an potentially getting tapas staff to notice.
social media is work, even if some folks might say otherwise, so if you're looking for certain outcome you've got to put the time and effort into it