the proxy may be blocked by the end site or not responding. Are they private proxies or public proxies?
No its not abandoned. It has a bunch of sources in it. The thing is those sources come and go. Some months they run out of bandwidth and are back the next month, its hit or miss, especially once they make it into Scrapebox. So every so many months they go thru and clear out the dead sources and add new ones, they just updated it a few months ago.public but they are fine for anything else. what results do you have with mass url shortener? isnt that addon abandoned?
No its not abandoned. It has a bunch of sources in it. The thing is those sources come and go. Some months they run out of bandwidth and are back the next month, its hit or miss, especially once they make it into Scrapebox. So every so many months they go thru and clear out the dead sources and add new ones, they just updated it a few months ago.
You can add your own though.