I never said anyone was wrong (ambiguity =/= incorrectness).
I said that the term 'combiner' - especially when used on its own without a contextual qualifier - is a very broad encompassing (and potentially ambiguous) term. The TFwiki page on "Combiner" illustrates various different kinds of Transformers that can fall under the umbrella term of 'Combiner.
As frustratingly confusing as it may be, if people refer to TF Prime RiD toys as just "RiD"... it's technically not wrong, but it can be jolly confusing.