what promotion options are available on the forum and generally in the internet.
Apart from this forum, there's also Facebook/Youtube ads
[only use it if you know how to properly target your audience].
What are other options?
In addition to what other users have commented, you can also try asking other crypto websites/platforms for an ad space of some sort.
community managers for Telegram?
Overview of Bitcointalk Signature Anti-Spam Campaign Managers- Some of the mentioned managers from this list offer their services for Telegram as well [make sure to read their ann threads].We also looking for translators
Overview of trusted/recommended Translatorsand frontend designers.
Overview of Bitcointalk Designers
buy advertising space from the forum (that appears between the first post and first reply to a topic).
This is what jackg was referring to:
Advertise on this forum - Round 314