It's quite easy to disable the daily or weekly digests if you don't want them. Not saying I think medium is perfect, but there are better ways to approach the problem then training a spam filter.
If I've tried to turn if off once, and either it hasn't worked or it later reverted, I'm not wasting any more time on it. I can press the spam button without even leaving my mail client. I don't work for these spammers, and I don't owe them anything.