I contacted Bittrex as a user to put in my vote to add Veritaseum to the exchange.
I think Bittrex require a small payment to add to the exchange. I'll ask in their Slack channel.
No, I think the payment, which was 3 BTC, is only required for promotion on the site.
If you have a major coin/token like VERI I'm sure they will do it because the sooner they do the sooner they start making their spread.