Many young companies will leverage their founder's or team's personal brands to catapult the company's brand. They'll attempt to "get the word out" about the company's product using the networks of their own team. They'll try to mold the message of the company using their own voices rather than the company's collective one. If you do it right, though, this catapulting process only lasts so long.
In the beginning your actions to help the company build its brand, or simply spread the word about something, may have a sizable impact. But as you continue you will notice your actions having a less and less of an impact. Sure, the metrics may stay the same (ie. the number of people you're able to make aware of something) but it will be less noticeable than before.
This is a good thing. It means the company is growing up.