In my area, babysitting and child-care is a popular side hustle for some SAHM and pioneers. The majority of it is under the table, no licenses or certifications. Many dub families avail themselves to these services because it's cheap and they want their kid around other JW's.
I can write a book about some of the things that have happened from these arrangements, most of it not good. The pioneers often take the kids they are charged with out in FS and/or older kids and non-JW family members have a hand in caring for the kids. Scully said it best, check for licenses and ask alot of questions before you agree to this person caring for your kids.