Just seeing this topic now, but I have written press releases as a way to generate media coverage for my series (The LATE, LATE News). IIRC, the ones I wrote were about the show in general, and it did get some coverage through Tubefilter back in 2014.
It’s been a while since I’ve checked, but I think I also wrote one to promote the season 1 finale. Since it’s been way too long since I’ve released any episodes, I’ve thought about doing an early release of the first 2 that were produced back in 2016. However, I also think it might be best to hold off on a release until every episode is finished for season 2.
I know there’s the blog I write for (Snobby Robot), plus Stareable and several other blogs/podcasts that cover web series, but it seems like you can only count them on one hand. I really hope that there will be more outlets that cover indie web series, since I don’t really think the big publications would be interested in covering anything that’s not studio/network backed, or anything that doesn’t feature a big name star. Just my opinion, though.