We run an e-commerce site where products sometimes get discontinued. There are some links from other websites that points to one of our products (A) that doesn't exist anymore, but we have a very similar product (B) that either came out later or replaced the previous discontinued product.
Is it OK to internally 301-redirect a permanently discontinued product to a similar newer product?
How about when there are no comparable products available and we want to save this incoming link? Would a category page work?
I've read some articles and posts and it seems to be OK to do
1, but I want to check with the StackExchange community as well. I also know some e-commerce sites prefer to leave discontinued items on their site in an effort to preserve points earned from them, but we are not doing that for a few reasons, which is irrelevant to the questions asked here.
Some things I read about the topic at hand: