$300-500/mo seems very cheap to reliably contact 1000 users directly on their phones and have them respond in almost all cases. It costs money because it's val

$300-500/mo seems very cheap to reliably contact 1000 users directly on their phones and have them respond in almost all cases. It costs money because it's valuable. Sign up for one of the Tier 1 services and move on, if you can't justify the cost you need to reassess your product and/or its pricing.