How long will Peaky Blinders and Penny Dreadful stay on Netflix?

Is it possible / probable that series such as Peaky Blinders and Penny Dreadful will disappear on Netflix (the license expires). Since when are these two series already on Netflix?

They should stay there forever, so theoretically.

In Netflix are actually quite a long time in contrast to Amazon, where some movies are just just a day as Prime in it.

And if they do disappear, there are mostly codes that reveal the hidden movies / series again