Beta reading is a separate skill from editing. I wouldn't ask your betas to "be your editor" -- it puts a lot of pressure on them. Editing is a lot of work and requires a lot of skill... that's why it's a
paid profession.
Beta reading is also a skilled profession, and really should be a paid one because a good beta is worth their weight in gold.
While "payment" isn't required here it should always be considered for a job well-done: the usual payment is a beta read of their work, but my friends and I also like to say thanks with affordable small gifts like loose leaf tea or book gift vouchers. You could also buy and review your beta's novels, if they have some available, and help signal boost their new releases social media promotions.