I've never paid for D&D Beyond, probavly never will (because that's why God invented pens and paper, dangnabbit)dang nabbing, but I would still be reached by Beyond communications because of course I have a free account (it's free, and it gives free stuff). So no, I think you are wildly underestimating the value and reach of that marketing muscle...though, again, it's academic since this isn't happening. But I can see why someone would rationally offer this deal and think they are doing the offeree a favor.