It is not recommended for now, no.
A growing number of beta readers are doing so, and it is their right. If you do pay them, you cannot allow them to review your book.
If your beta read offers substantial value, you could tip them. Of course, you then still cannot ask them to review on Amazon and other boom platforms where exchanging anything for a review is forbidden.
Kai Wilson-Viola writes under various names, and in all genres. Co-founder and webmistress of the IAG site, she writes content on request of members.
She has written several books including the Ten Hour Marketing Plan and 12×12 – tutorials for social media.
When not writing, she can be found maintaining sites, designing themes, managing a charity called the Less than Three foundation, gaming, knitting or reading.