Too Long; Didn't Read
In its <a href="https://hackernoon.com/tagged/startup" target="_blank">Startup</a> plan, German startup <a href="https://www.zenloop.com/en" target="_blank">zenloop</a> sells NPS app subscriptions to startups for <a href="https://www.zenloop.com/en/pricing" target="_blank">€299</a> per month.