I contacted Yilay privately and asked him why he had reluctantly included an interest rate, then gone back and removed it and he informed me that it is because interest rates can change daily. I told him to post them daily and he declined to and asked to be removed.
Regretfully I have done that. Sadly, a post that asks people to contact them for details (and then lists every way possible to contact them) is not useful information for a public forum, and is in fact just a weak advert.