FortiDeceptor is a useful service for a large corporate network that has extensive network resources and can commit the manpower to protect them. It's a straightforward approach to offer a high degree of protection from malicious content and attacks. A smaller network might not benefit from a traditional firewall and IPS would likely be sufficient.
Since we have other Fortinet solutions like Fortigate NGFW & FortiSIEM in place, they share the threat intelligence with each other, and FortiDeceptor works very well in FortiFabric environments, We decided to go with FortiDeceptor for Deception technology. In the case of Rapid7 & Smokescreen, we had to counter the integration issue with existing IT infra, Security solutions should not work in silos, they need to share intelligence with each other to get the best from the existing Solution & to get the best ROI.