It would become a magnet. However, given the broader membership base and their history, I think it would be harder to take over something like the EFF or e.g. t

It would become a magnet. However, given the broader membership base and their history, I think it would be harder to take over something like the EFF or e.g. the mozilla Foundation (and before you yell "browser maker, conflict of interest" at me, I have a .dev domain to sell to you...). The ISOC, while they proudly proclaim 67K members, is an organization with largely silent/inactive members (aside from lobbyists), most of whom probably forgot by now that they are members at all - or at least that's what it seems to be from my perspective. The EFF (or even mozilla) on the other hand have more active members, and it would be harder to do a (slow-moving) hostile takeover. Of course, everything can be undermined and taken over, as the ISOC shows. However, the ISOC seems "burned" at this point where it would be extremely hard to rebuild and recover, while the EFF e.g. is still functional and it would be easier to keep it from deteriorating in the first place than trying to undo damage already done.