Should We Focus Bottom Up or Top Down?

Hey,

At our startup we have had our product live for about a month now. In order for us to get users we have been trying both approaches;

1st) Target event organisers who then advertise the app for attendees to use.

2nd) Try to contact users to use the app for their own purposes.

For us we are having really good success going for the first option as event organisers & marketers love the benefits our product gives them in terms of exposure.

My question is : If I keep focussing on the Top Down approach do you think it could lead to the product scaling as fast as Bottom Up?

For us focusing on event organisers etc has not been as difficult at communicating the benefits to end users.