I must admit to having a penchant for obscure characters too. Would give my right arm for a reasonably priced Turbo Master. But given the cost of the subscription service I wasn't about to shell out that much for the likes of Carzap who I had never even heard of and I reckon a lot of others were the same. That said, good on those that did grab these characters and are enjoying them
I don't think you could count the likes of Bludgeon as equally obscure - even without his shell he has been cropping up in fiction for decades now. And there are enough people who know every single G1 character that the double Targetmasters would have a commercial appeal to those who have joined the TFCC.