nicequest.comは安全ですか？

NiceQuest seemed like a great idea, I was moved across from one survey house to NiceQuest. There seems to be a wide variety of items in the rewards section, which is appealing, but they don't tell you how many shells you'll earn before you start a survey, they don't often tell you how long the survey will take you on average. Plus if you order ebooks from them, you have to register to a different site, which then can sell your information elsewhere, in read the ebook, you thought you ordered to own, only to find that, it is just a rental, you have 3 months to read it, then its gone. Also, even in order to get that far, you have to sign up to memberships of these ebook rental sites. It is, therefore, it seems bit misleading for NiceQuest to say you're getting an ebook, when you're really only getting access to it on a rental basis. Once I'd set up the account with the 3rd party ebook rental store, as requested, I was told that the ebooks "were not available in my country" however, I could then buy a subscription to the site in order to read the books, that I ordered via nice quest. (oh and if I did that, guess who gets a commission for me signing up?) I complained to nicequest and after about the issue and they replied 6 days later, saying "we don’t’ specify that you are buying an ebook" which may be true, but they also don't say you're only renting it for a limited time.