"As a protocol droid, I cannot actually recommend the best smelling cleaning product, but these are the most purchased cleaning products:"

...followed by a semi-hallucinated list containing at least a few being marketed by C3PO.

Centralization makes a difference here I think. Disney built an impressive machine where everything feeds on everything else. The problem is not so much bad sequels per se, it’s all the marketing that goes into making sure they solidly occupy their corner of our mindshare and force the whole industry to compete churning out more and more subpar sequels. If one company would build a Star Wars theme park, another produced toys etc. etc. this might not be a huge concern.