I hate huge watermarks, but I guess I'll have no choice from now on:
I'm actually HAPPY to help out fellow photographers, and I don't mind others using this photo (in fact it's freely available under Creative Commons 3.0 Attribution-ShareAlike license), but geez... have some basic decency people... The only condition is attribution. Either my signature/watermark stays intact or I get credited in another, equivalent, visible way. If that condition is met, you're perfectly free to use it however you see fit, even on a commercial site for your own business.
It doesn't even make sense to try and sneak it and hide... honestly, what the ****, people? Especially that Arab bling-selling site. Boo, hiss.