I've generally been pleased with the trade-in value of items available in the Black ISO Market, but this one genuinely confuses me.

Is anyone actually doing these trades? It just doesn't seem like a very good value to me.
The 5% T5CC selector is 2,250 frags of a guaranteed class, at the cost of 3,600 total random frags. I guess if you're just dying to rank a champ where that's all you need, it gives a viable option, but I'd personally rather have more random frags than less of a specific class.
Then there's the T4CC crystal deal. One whole t4 cat to get 1,800 random frags in return doesn't seem great either. It could be, but the fact that you still need 15 t4 crystals to get a 6* champ from r1 to r3 makes me think this is a terrible value too.
I feel like trading in 1 t4 cat crystal in exchange for a 5% t5 selector would be a more reasonable deal. I don't think it's be game breaking at all, and a more reasonable exchange given availability of the resources.
Am I alone in thinking these are a pretty bad value by ISO Market standards?