I have some hope that the EU will outlaw promotional push notifications that are not opt-in, similar to email spam. As it stands, push notifications are almost entirely useless because of all the noise.
I'm an iPhone user, I have a lot of apps on it, I receive a lot of notifications and I get no promotional notifications. I hope the "almost entirely useless" line was hyperbole :)
If you have the possibility ditch them, because promotional crap in the context of a payed service, with no way to easily turn it off, is an abuse IMO.
I see no unwanted ones as a result, because I only let well-behaved apps use notifications.