I dealt with two questions today that seemed on the more elementary side in terms of
mathematical content.  Geoff Robinson posted some interesting answers, more so than
my attempts.  Coincidentally, each question received four fairly cogent and in some cases nicely
 varied and detailed answers.

One of them was migrated to math.SE (https://mathoverflow.net/questions/172983/represent-an-integer-as-a-sum-of-n-non-consecutive-squares) , the other ( https://mathoverflow.net/questions/172855/maximum-value-of-the-binomial-coefficient-as-a-polynomial) not.  Why?

In addition to what seems to me to be an inconsistency in policy (I can imagine
both migrated or both staying, but not just one of them), I wonder how they
participate in accounting.  I have no math.SE account formally; is there some
entity that tabulates my efforts and will reveal them if and when I do create an
account?  Are MathOverflow stats affected in any way by future activity on the
question?  If I don't ever create a math.SE account, will there be ways to search the
Math.SE forum for traces of my activity in the future?  Basically, how does migration
affect the activity and statistics recording for an account that participated pre-migration?

A pointer to the relevant SE documentation would be appreciated.