Yes, but that butterfly could be used for commercial projects without releases, no? What if there are logos / identifiable property or people?
You are mixing two completely different things. You can use a Rights Managed image for commercial usage if it has releases. The concept of RF-RM is about the licence, not necessarily the use (but the use can be affected by the licence). You can illustrate a newspaper article with a RF image. You can run an ad with a RM image that is released. You can have a RM image, with releases, but with restrictions that prevent certain specific commercial uses (for example, tobacco ads).
You should do more research, there is plenty of material out there about this broad and not so easy subject.