"Now they want to build a moat so others can't do what they did." Do you mean to say "can't use their stuff for free, but can do what they did if they want", i

"Now they want to build a moat so others can't do what they did." Do you mean to say "can't use their stuff for free, but can do what they did if they want", i.e. a moat to absolutely prevent others from stuff is usually in IP etc. whereas restrictive licensing means you need to 'write it yourself' if you want it. Despite the conflation of early Redis and the corporate Redis - almost all commercial projects that use Open Source are the same thing really. ABC Corp. uses Open Source XYZ to make software and protects their addtions. It just so happens that in this case, it's Redis going into a commercial version of Redis, not Redis going into CAD software or something.