I voted Reddit, with my little knowledge, ecency unique features would resonates well with Reddit audience.

They share common core values like community driven creation, curation and engagement, upvotes and the rest.

In addition ecency is built on the hive blockchain, which adds decentralization, transparency and a reward system directly tied to users contribution through cryptocurrency.

Reddit is a centralized platform where you have a central authority unlike ecency.with this kind of feature, Reddit platform would so much be the best platform for ecency to advertise.Because they would so welcome it, testing decentralization would so much be accepted and they are tech driven at that in Reddit.So it would be a good choice for ecency.