Some known companies with Billion dollar valuations raising $500M. Notice the first two are not profitable companies. Imagine nFusz with the cleaned up balance sheet, growing customer base, expanding product line would be valued it this year.

Dropbox files for a $500 million IPO
The company posted sales of $1.1 billion in 2017, up from $845 million in the year prior. But like many tech companies going public, Dropbox is not profitable. It lost $112 million in 2017, down from $210 million in 2016.
http://money.cnn.com/2018/02/23/technology/dr...index.html

Slack is in the midst of raising another $500 million in financing at what could be a $5 billion valuation.
Slack also got some interest with a $9 billion price tag from Amazon.
1.5 million paying customers,currently has $1 billion in revenue, but is not profitable yet.

https://techcrunch.com/2017/06/15/slack-is-re...f-funding/

Outcome Health ditches bootstraps, raises $500M at $5B valuation
https://www.builtinchicago.org/2017/05/31/out...-over-500m