Re: Flickr, Groups
Yahoo Groups used to be pretty good, but is now a shadow of its former self having been hacked to bits during refurbishments and upgrades over the last few years to the point it's barely usable. I know of several groups that have migrated away either to custom solutions or groups on Facebook (yes, I know). One group remains there, clinging to the wreckage, simply because they can't provide their own bespoke solution and it's not been possible to locate a suitable alternative.
I can only conclude that Yahoo Groups is a loss maker for the P0wnage palace and they've deliberately broken it to encourage people to sod off. If it was profitable then paid for alternatives would have popped up to grab those departing the mess at Yahoo. I've looked and nothing I've found (paid for or adverts) offers anything close to the same features and functionality.
Biting the hand that feeds IT
