[tbb-dev] Rationale behind the move to Disconnect Search?

[intrigeri]

Hi,

we're in the process of upgrading Tor Browser to 4.5 in Tails, and
I noticed the migration to Disconnect Search as the default search
engine. That's the kind of changes that we often have to justify in
face of users and auditors, but I wasn't able to find the rationale
behind this decision on the corresponding ticket [1]. 

I see the release announcement [2] says:

> Disconnect provides private Google search results to Tor users
> without Captchas or bans.

And below, Georg commented:

> Startpage was not happy with our traffic and showed sometimes
> CAPTCHAs. Disconnect on the other hand approached us with respect to
> search engine traffic and donated some money.

So, just to clarify: is that the entire rationale behind this move?

[1] https://trac.torproject.org/projects/tor/ticket/14490
[2] https://blog.torproject.org/blog/tor-browser-45-released

Cheers,
-- 
intrigeri