Pretty much the whole industry does.
Just look at IBM, Microsoft, JP Morgan... sometimes I wonder if these companies themselves are aware of the bullshit they're selling or whethere they're too blinded by the cargo cult called "blockchain, the technology". I mean supposedly there must be enough smart people working at these companies for them to realize that it's not the right tool for the job... right? Right? When the European Central Bank did their research on using a blockchain for international remittance they at least had the integrity to admit: Nope, that's not gonna work for us. Alas, using existing public infrastructure -- ie. decentralized blockchains -- is apparently not as profitable as trying to force your own proprietary standards.
Aw well. Enough of a rant. This too, shall pass.
They certainly know how to smell money. Until we get 100% secured and trusted homomorphic encryption I would not think to willingly put my data on their servers. Now cloud servers and cloud computing is really well advertised to us as means of easier deploying our apps or what ever else on the internet. Since they've developed advanced tools, of course they are going to sell you the idea to use their platform for the blockchain operations. It's just in todays world the data is the one of the most valuble asset and specially if these companies have some of our data they can predict with good certainty what could potentially occur and then position themselves in the good way for their own benefit.
But heck, AWS is not faulty for doing this move. I know that people were using in the past to host their wallets in cloud servers and thus they saw the need to make it simpler for people to use their service.
But people still don't care much about the privacy, even with fb drama (although we knew what they were doing), people simply criticize them but continue to use their platform. Same goes for cloud services, they are cheaper way and thus many people are willing to give their privacy for that.