Both are obligated to respect copyrights.
Beta Readers, paid or unpaid, are responsible for providing feedback and editing as agreed on drafts of books not yet published to retail sites. Authors and publisher can ask for very specific things. Feedback directly to author, not to review sites.
Consumer reviewers (aka customers and readers) are obligated to respect copyright by legally obtaining the book and not pirating it. Period. There is no contract. Not responsible to review every new edition or to remove their review of edition read because author puts out a new edition. Not responsible for proving their qualifications (qualification = they legally got the published book), reading the book, reviewing the book or anything else.
Paid or Professional Reviewers can also be asked for specific marketing terms, deadlines, specific venues for the review, editing feedback and any number of things -- within website's or publication's set policies. Obligated to follow the agreement/contract. On Amazon, paid review in editorial section only; not permitted in with customer reviews. On other consumer review sites governed by U.S. law, FTC requires all incentives be disclosed in the review. Not obligated to review every new edition for free unless specified in contract.
Unless book description notes the customer is purchasing a draft for purpose of author getting editorial feedback , customer on retail site won't know the difference between a completely published book and a published draft of a book still needing editing anyway (well, once begin reading may notice needs editing but not known at time of purchase).
To the customer on a retail site -- publishing a book on a retail site is publishing a book for retail sales/downloads. It's not to pay the author to then provide free editing. It's not a Kickstarter fundraiser for the author to get paid so they can afford editing and other costs of doing business including cover art. Customers see books in a retail site's product catalog and have no way of knowing -- unless noted in book description -- author thinks they are contracting to provide anything. It literally looks like any other book for retail sale/download. Many readers don't even notice the publsher name or aren't necessarily familiar enough with all the imprints to know if traditional or self-publshed (and Amazon increasingly puts publisher and ISBN further away from the product page buy buttons where not always going to scroll that far).
Unlikely to see buying your book worthy of criminal charges, loss of followers no longer trusting them or loss of site account by agreeing to author's review requirement that are against site or U.S. law such as "don't say you got the book for free" or "don't say you got book on condition of only giving a five star review"... I think it's seriously unrealistic of an author of a likely under $10 or even free book to even ask a customer to risk anything beyond their reading time, certainly not potential FTC fines.
Personally, I don't bother reading reviews on the sites that require a minimum 4-star rating and positive comments only. Those stop being opinions if too restricted. Seriously, if you can only give it a ★★★★☆ or ★★★★★ that's no way a fve star/unit scale, it's a two unit scale, possibly something like one thumbs up and two thumbs up or ★☆ and ★★; not 4 or 5 of anything.