Share limit per member is 5% of total shares. Currently that means a limit of 2125. Adjusted shares do not have a limit, though the way that delegation and upvoting bonuses work will be changed soon.
Please review our announcement on that topic: https://steemit.com/busy/@steembasicincome/steem-basic-income-rshares-and-automation
And then let us know if you still have any questions.
RE: Steem Basic Income - Weekly Delegation Report 21 August 2018