Kobo offered 100 points per book read during February, but I had to chase them up several times and they still refuse to give the points earned by the terms of their promotion. The help centre is very difficult to locate and contact, the staff don't seem to know anything about the promotion, and took a long time to come back to me with a result (which was wrong in any case).
The app is locking up my phone and doesn't seem to be able to handle lots of books in your personal library (1000+), forcing to have periodic purges whether I want to or not. You can't sort by genre on the iphone app, which would have been very helpful.
The bonus is there are many good books available, including many free books from starting authors and introducing ongoing series. I would be happier putting up with the glitches in the app if the service was honest and reliable re: pricing and promotions. Unless Kobo put right their refusal to honour their promotion I will look for another service to continue with.