^yeah I can't stand IV after V... SA and VC, those I can still replay for nostalgia and the 'feels', the music... But going back to the gunplay, missions, and graphics of IV and I end up quiting again so fast and just replaying V a Nth time. That said, if I had IV on PC then this wouldn't be a problem because there are some awesome gameplay and texture mods for IV. But on the PS3, I just can't get into it. Same with how random all the sub-plots are... I like that, whether it's good or bad quality, V is a much more focused plot.
Anyhow, as for GTA SA...
I read the Rockstar Newswire, check Social Club, etc basically every day, multiple times a day. And it's not unusual for R* to have an update once in a while that's a tribute or something to SA, RDR, etc. Usually a bunch of RDR themed maps or something once in a while.
But this week, R* has had updates almost every single day for GTA SA's anniversary, and there's yet another one this morning, and it struck me as unusual even for an anniversary. They're really rolling out a lot of small fan updates by their typical standards...
I'm not sure what that means for a re-release of SA but it does seem to me that they have above average amounts of things planned this week for SA.