I personally have always found DeepDyve to be kinda pointless, as when you need to go back and refresh your memory before citing the article later, your access has expired.
Hi there, I'm an engineer at DeepDyve. I'm wondering how long your rental was for - was it a 30 day rental? And was 30 days too short to cite the article later? I'll talk to some people here, but we may be able to extend that period pretty easily.