SEO, youtube, influencers, vimeo, twitter or else?
Do you spend money for promotion?
I would promote my AE templates from Gumroad, but never videohive ones, when envato takes such a massive cut 
why bring profit to them? For me, youtube has worked quite well, with trending topics such as instagram stories lets say. If the product and preview clip are top quality it tends to get views and some people press on the “get here” link too 
Thank you for feedback
Im looking to Gumroad now.