For example: if a post was shared on facebook then the vote could be higher?
This is the path that large content curation accounts should follow. While it is true that burning helps, getting incentivized comments, reblogs also help the platform's economy.
Give 100% positive votes to posts that have comments, that publish or link to your posts on mastodon, x, facebook, instagram. This gives an added value, publicity and the way the platform economy is created, the fees that are generated contribute to a better price.