Price tranches are good because they make expenses easily predictable while still providing some operational flexibility. That's especially good for enterprise customers with finance teams.
They can also make good money if you set the boundaries right. If a lot of your customers have ~30 domains, a boundary at 25 might make you more money than per-___domain pricing.
I would also look to see if you can add failover as a feature. With the recent DDOS attacks against DNS providers, a lot of companies are considering failover planning for DNS who previously ignored that. To really hit big bucks with this, you will need to integrate with bigger DNS providers like Dyn, UltraDNS, etc.
I agree that you're not charging enough. Keep the free level but then I would charge at least a dollar per ___domain.
They can also make good money if you set the boundaries right. If a lot of your customers have ~30 domains, a boundary at 25 might make you more money than per-___domain pricing.
I would also look to see if you can add failover as a feature. With the recent DDOS attacks against DNS providers, a lot of companies are considering failover planning for DNS who previously ignored that. To really hit big bucks with this, you will need to integrate with bigger DNS providers like Dyn, UltraDNS, etc.
I agree that you're not charging enough. Keep the free level but then I would charge at least a dollar per ___domain.