If you are considering joiing their progra with the hopes of making money, pay careful attention to number twenty in their terms of use. Namely:
20.1. Termination. You or
Rakuten Marketing may, at any time, with or without cause, terminate
this Agreement and your participation in the Network or use of any other
Rakuten Marketing Offering. You may affect such termination through
your Network Publisher Account Area or by written notice to Rakuten
Marketing subject to actual receipt thereof.
20.2. Restricted Use.
Alternatively, Rakuten Marketing may, at any time, with or without
notice, in its sole discretion, suspend, limit, restrict, condition or
deny your access to or use of all or any part of the Network or any
Rakuten Marketing Offering.
Extemely bad business for publishers.
Buyers beware, read the terms. Luckily for me I had not earned any money. I have receipts I would happily share about this if need be.