Why Avast wouldn’t state the limit of urls for site blocking? It certainly isn’t unlimited, there has to be a number! Is it that hard for Avast to add a bit of text in the gui stating the limit or add a few codes to restrict urls after the limit?
Are you adding several thousand URLs to the blocker? If not, I surely wouldn’t worry too much about the limit on this. It’s a pretty high limit, if it even really has a limit. I’ve never seen any AV program show the limit of sites it can block.