From last webcamshow - members get one like that every 3 months (is it worth to pay?)
Define "worth it". That's all up to personal preference.
If you go into Nikki's Playmates knowing that Nikki is a tease model - nothing more - then you will get exactly what you pay for.
If you go in thinking that she's suddenly going to fist herself to squirting for her paying members, then you may be a tad disappointed.
It's all about expectation. Very few people actually get ripped off in any way, shape, or form in this world. They just don't do any research while setting their expectations unrealistically high.