Is funding ocean clean ups worthwhile when so much plastic is still going in?

In my efforts to promote Better Century through other networks I come across things which are worthwhile sharing. This 4 Ocean clean up looks like a great initiative. You buy a bracelet and that helps take a pound of plastic waste out of the ocean.

It seems it would be a great gift for people. But do people think that schemes like this are really effective?

https://4ocean.com/products/leatherback-sea-turtle-bracelet