https://steemit.com/qurator/@qurator/qurator-4-0-or-new-multiplier-system
I can not see any limits (it was 150 if I remember right when I enter).
BUT - if you are a member you get upvotes, contest and good stuff. If you deligate without beeing a member you only get token-reward.

So - I think it is much better to be a member.