On #Ecency, to Promote a post is to request the Ecency team (with practically a 100% approval rate) to show your post as an advertisement (in your chosen duration, where a longer duration requires slightly more Points) on the Ecency frontend, rotated with all other posts that are also being promoted. 🤓

On the other hand, to Boost a post is to request the Ecency team (with roughly 30% approval rate) to vote (curate) your post or long comment. 🤓 Anyway, I don't notice that the amount of Points you use to request to Boost a post or comment affects the chance of approval; it's about how long and good your content is that makes the Ecency team determine if they will curate your content (or just refund your Points). 😏