BuddyPress.org

Hello,
I am leaving this here in case anybody else is at wits end with this problem. I installed the following plugin:

https://wordpress.org/extend/plugins/si-captcha-for-wordpress/

It is a capcha for subscriber sign up. Our buddypress has not been released yet, and we were getting upwards of a dozen spam sign ups a day. I installed this plugin a week ago. So far, no spam signups. I hope this helps.