Here are many methods you can use to promote your app.
1. Optimize your App
Only your app have high quality, new users would like to install your app among the millions of other apps, old users will not delete it and recommend it to others. So the quality of your app is the basic thing, and it...
Attention: "role based name" email prefixes such as support, webmaster, info, contact, forum, service, affiliate, admin, traffic, partners, marketing, etc., for our member accounts are not permitted. They are acceptable for a vendor listing, but not for the member email. This is due to bulk email processors scrubbing them for delivery due to extremely high bounce rates. Please apply for membership using a personalized email prefix. Something like email@example.com.
If we discover you signed up with a role based name we will give you only one message to change it. After 3 days your account will be removed if the email is not changed.