I don't think I've gotten any promotion by staff on tapas. Here's the thing....for me I'm not convinced that promotion would do any good in the long run for my comic. The times I've been promoted on (tapas competitor) sure subs may go up initially, but then they start the endless bleed of people leaving when they actually get time to sit down and read. I've done much better with plain old organic growth because by the time people actually find me they:
a. know what they're getting into.
b. are motivated comic readers who actively seek out new comics, and
c. tend to be a bit older, more proactive, and more intellectually engaged than people who want an externally-curated feed of content.
I'll reach Tapas and (competitors') main audience, the young, inexperienced, just venturing into webcomics crowd in a few years when they're older, more mature, and start to search for content on their own and the time is right. Webcomics are a marathon, not a footrace. Tapas curates their feeds to pull people into a pipeline, I serve an audience that's further down that process, so even though I'm not directly benefiting from Tapas' promotion, I'm definitely benefiting in the long run. anyways, just some perspective for people who may be frustrated that their comic isn't featured.