Still worth it for me, especially with the Amazon Prime Rewards credit card. Amazon is still usually the best price online, and 5% for Amazon purchases is hard to beat.
Hard to say if I'll stay but it feels like a lot of companies are doing this. Netflix has done it as well... I feel companies are running out of ideas to scale their business and so they just say, "Wait a fucking second... our product is awesome! It's worth more!" I kind of wonder how long this will last.