So should it look like this when I open the wastegate?

 

It's that eBay junk..yes, it's garbage and garbage aluminum will do that.. Yes. You already knew that it was eBay, so this was should be no surprise to you

Yes. Now you need a new one. TiAL or TurboSmart.

No. Don't try to fix this "for now". Now it's time to understand the lesson and remedy the situation..

Just getting all the nonsense out of the way