Yes, you are allowed to bump your own thread to keep a relevant topic.
I think that some items it really doesn't matter if they are for tc or for USD.
Honestly, I do not mind that some items are limited to tc, just as I don't mind some items are limited for just USD.
Either way, I see it as ineffective when you could simply buy the tc, or sell tc for USD.
Yes, it calls for a more lengthy process, but it doesn't hurt.
Overall I think it is completely fine for some items to be tc exclusive and vise versa