21.7M is a lot of potential text messages and credit/debit swipes. And this is just one airline operating at roughly 50% of what they flew the yr pre covid. And they seem to be adding routes regularly. It's definitely not hard to see how revenue numbers could potentially ramp if the monetization of the service is there.
Also, this tidbit from the RunwayGirl article about a month ago about the third unnamed customer is still intriguing. It will be interesting to see how that plays out. Who would come right in with no trial period?
From the article - Chapman confirmed to Runway Girl Network that the Wizz Air UK deployment is a pilot program, and that the carrier can make a decision about full-fleet equipage in time. “On other airlines, we have an agreement for a similar program with [Indonesia’s] Citilink. We are in serious discussions with a third unnamed, but it won’t be a trial,” he said.