A chat tolerates a professional and rejects an advertisement, and the difference is not in what you sell but in when and how you mention it.
The default: answer, do not offer
Answer questions in your field completely, including the part where the answer is "you do not need to buy anything for this". That single habit does more for reputation than any pitch, and it is what makes the later mention acceptable.
When you can mention what you do
- When asked directly. "What do you do?" is an invitation; answer plainly and stop.
- When the answer requires it. "We solved this with X, though there are other ways" is fine. A feature list is not.
- Never twice in one thread. The second mention converts the first into advertising retrospectively.
Things that get you removed
Answering only questions in your field, instantly, always. Someone visibly on duty irritates as much as a banner.
Correcting people publicly for sport. Being right is not the same as being welcome.
Linking to yourself. In most chats a link is deleted regardless of context — the route to you is the profile.
Arguing about anything off-topic. Politics ends memberships faster than advertising does.
Frequency
Being present daily and speaking occasionally beats speaking daily. A participant who says something once every few days across weeks reads as a regular; one who posts constantly reads as a fixture with an agenda.
If you want more room
Ask rather than push. An explicit arrangement with the admin is more durable than trying to stay under the radar — getting permission from a chat admin.
And on the arithmetic of doing this across several chats: how much time chats take.
How Neurogram does this
Everything above is manual work that runs into the number of hours in a day. Neurogram does it on your own accounts and without you: it collects channels and audiences, writes comments and replies with a language model, and keeps limits and quiet hours so the accounts survive. See pricing or look at your case.