My Yahoo group hardly ever gets used. Of my 211 listed members 68 are bouncing. They joined between 2003 and 2011. Because it is a health related group, I suspect (fear) many if not all of these are perhaps no longer with us. Also most have Yahoo email addresses against their membership and the last bouncing message says something to the effect "this person no longer has a Yahoo email account". Others (non Yahoo) say "unreachable" whilst some say "(This message cannot be viewed because it was sent from another group)" which seems strange.
Anyway. If I transfer my list to Groups.io I understand bouncing members get removed in the process. Or if I were first to remove them myself, could they, if still with us, whilst the group is still on Yahoo, get to read the messages from the Group page? I feel slightly nervous about assuming bouncing members are no longer with us, even though I do suspect it, when in fact they might still be.
Also Yahoo used to provide code to insert a joining link and graphic into a webpage. Does Groups.io do this too?
Robert