no, i get it - but i also think your paranoia on this particular issue is unjustified.
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if agileBits goes away, you export to csv, switch to keepass. so far, they haven't, they have committed to maintaining the ability for existing local sync users to do local sync.
I don't have a link to the web plugin -> 1password vulnerability, but it was about 1-2 years ago (i.e., well into the life of 1password 5 or 6 or whatever and affected all previous versions.
essentially malware running on your machine could intercept traffic between 1password and the web plugin that was sent in the clear, or something like that.
running ancient versions of security software is not a solution if you disagree with the future direction of the product. accept the direction and continue to keep up to date, or jump ship to another product. software regularly has flaws, and sticking with really old versions of software involved in keeping your passwords secure is a big risk.
at least, if you do so, be SURE to follow the change logs to ensure that you're aware of any vulnerabilities discovered that impact your version of the software.
If you're not going to keep up to date with this based on this future policy direction for new customers only, I'd recommend Keepass.
do you expect GM or Ford or whatever to upgrade the engine in your car whenever some new tech comes out, for free?
I am not sure what your point is talking about a vulnerability 1 or 2 years ago has to do with present discussion. That was fixed long ago.
You still don't see my point about being able to use nonsubscription 1password even if there is no Agilebit.