22. Advertising (this includes mining pools, gambling services, exchanges, shops, etc.) in others threads' is no longer allowed, including, but not limited to, in altcoin announcement threads. [8]
It is clear from the unofficial rule #22 quoted above. If you advertise your service in threads of other companies or people, it is considered as spam. Honestly, about months ago, in late of 2019, I saw one guy provides such spam advertisement with more than one hundred posts with same contents (that poster only changed name of project for each topic in which he posted).
What do you think about that? Is it a spam? I am sure it is and I don't care how beautiful such advertisement template is. Spam is spam.
To avoid this, you have to create your own thread for your service, in which you can provide updates. But you have to obey two rules below. Bumps are clear but sometimes I saw updates are considered as bumps too.
13. Bumps, "updates" are limited to once per 24 hours.[2]
21. Old bumps should be deleted. [2]