@bbc.reporter
Good questions.
Before this situation occured, there was no issue before and after the sale of Steemit
There was a similar issue a year or so ago when Steemit announced major layoffs, the CEO of Steemit was acting in a very evasive and sketchy way, and public statements about the use of the stake did not match what people were seeing on the blockchain. In effect, one can say that there was already concern about an exit scam being in the process of occurring. A fork to protect the ninja-mined stake aka dev fund was discussed among witnesses and stakeholders (the PR in #3 above was part of this), and there were even some direct talks between witnesses, stakeholders, and Steemit. Ultimately, a fork did not go ahead at that time, and Steemit made some other commitments and process changes which, tentatively at least, satisfied the community.
So, yes, this matter was in play before the sale even, and the lack of true on-chain governance and control over the ninja-mined stake, how it was used, and the community considering forks to address that issue is something that has lingered for a long time, and not something new to Justin.
After the sale, there was no immediate anticipation of an exit scam per se, but there were numerous statements from Justin about replacing the Steem blockchain (described as proprietary, which is not true) and migrating all users to Tron. There was a page put up on Poloniex (which Justin owns, or is part of a group that owns) telling Steem users how to exchange their Steem for Tron-based tokens.
During this period of about a week, many attempts were made by witnesses and major stakeholders both publicly and privately to communicate with Justin and other Tron leadership to discuss these plans and the lack of support for them in the Steem community. All of those attempts were either ignored or explicitly rejected.
Also during this period, an "AMA" video session was conducted during which, out of several dozen community questions submitted (and acknowledged by Steemit management), only one or two were answered before ending the session with a statement to the effect of "now that we have answered all of the questions (!), let's wrap things up".
As part of the same session, it was stated that the migration and token swap plan was put on hold. However, communications and PR from Justin and Tron continued to promote the upcoming migration and token swap, and the Poloniex page remained up. Further attempts to engage and ask that these efforts be put on hold were ignored or rejected.
So the witnesses and major stakeholders decided to move ahead with the temporary soft fork and freeze the stake in place until what was seen as serious threat to the blockchain could be more effectively addressed. These threats could theoretically include an exit scam as well as using the stake (which although committed to be non-voting, in practice represents about 70% of votes) to take control of the blockchain and even shut it down, forcing a migration.
To revisit one more point from my previous reply, and referenced in your reply above ("not just blocked from governance"), it is not technically possible to block stake from governance without also blocking it from moving. Once the stake is moved, it can be placed into sock puppet accounts and used to take over full control from there, at which point it is no longer possible to stop it from voting for governance. So to prevent it from being used for governance also requires stopping it from moving. This need not be permanent (and, as implemented, was not) but only long enough for governance issues to be resolved.
Finally, to clarify another point, this was not witnesses acting alone, as witnesses don't have any real power on their own (voting changes are instant, so any or all witnesses can be voted out and replaced). It was witnesses working with the support of major stakeholders. Following the activation of the soft fork, stakeholders not part of that discussion could still vote out the witnesses supporting the fork and vote in witnesses opposed to it (there were both in the top 50 ranks), but, in fact, the full complement of stakeholders increased support for the pro-fork witnesses and decreased support for the anti-fork witnesses, and this continued to be the case for several days. So it can be said that stakeholders overwhelmingly supported the step, making it a true exercise of governance and not a "witness plot".
So to answer your question, I would not say that an exit scam was
anticipated, though it was certainly possible. However, there were ample reasons to assess that the stake could be used to threaten the blockchain. To guard against that requires stopping it from voting as well as stopping it from moving. Preventing an exit scam was an additional benefit, but not really the primary intent.