The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
No limit, as far as I know. However, if you advertize the same subnet(s) to different eBGP peers, you should be able to reach the advertized IP space from those entry points.
If you peer with different AS eBGP peers, you'll probably also want to insure your AS doesn't become a transit for them.