Following our TC launch, we were featured in other channels, which gave us more signups. 300 might not seem like a lot, but these figures are very conservative and we only counted users that really tried the app.
...which are the only ones that matter, no? So if only 300 "really" tried the app and 2,201,302 signed up, you obviously only care about the 300 if that's the number you're mentioning.
Why try to sound mightier saying "these figures are very conservative" and "we only counted users that really tried the app"?
Now, they will necessarily appear smaller than what you can see in other blog posts. YC partners will tell you that most startups shouldn't expect an immediate rush of users and that success is built over time.