Opt in for what? They say to "share" your data with Ghostery, but what they do is sell your data to advertisers. Shouldn't an anti-tracking solution be more transparent than the problem?
Ghostery collects tracker information and not individual users info. Ghostery requires an opt-in before any data is shared. Anyone wishing to dig deeper should read the source code since its not obfuscated unlike some of your disconnect's open sourced code. If you do however have ideas on how we should be more transparent, by all means, please share them.