make sure you use the splintertalk.io front end and it should put in the SPT tag where people are looking for this type of content. If its about finance I would also recommend #leofinance tag.

Most of those other tags either no one is monitoring or are actually 'incorrectly used'

Hive tag is traditionally for talking about protocol level stuff, but so many people use it wrong that they started the hive governance community for that.

hive-engine tag is monitored but only rewards people who are talking about the hive-engine protocol per se, not generally about tokens on it.

It can be kind of confusing at first, but the truth is there are not a lot of rules, and just a lot of independent cultures around 'what people have been doing' with regards to tags.

Use the two I mentioned above with posts like this.