I think he is working with Nextcloud, so larger companies can subscribe to their support. For individuals or small companies that is more difficult. Ideally you can code yourself or have someone in your company that you can ask, or use the freelancing section here: 💸 Nextcloud freelancing - Nextcloud community
There are a few topics around here how to give some financial incentives to solve certain issues. Or even develop specific features.
For apps, it’s good to have several developers and not everything is just back to one developer. If they are not working for Nextcloud, these are open people working in their free time. Ideally, we would have more developers around in the Nextcloud ecosystem that you can even pay to get some work done.