It's unfortunate that the main function of this add-on was effectively crippled by the owners of SteamGifts.com, whereby auto-joining giveaways en masse via scripts/add-ons will result in a ban from the website, but even so, the other functionality this add-on gives you makes it worth installing regardless. For instance, an infinite-scrolling page, a visual indicator of your current points permanently visible as you scroll, the ability to join & leave a giveaway without navigating away from the page, hide giveaways you've already joined, hide all DLCs, and the ability to monitor and alert you to won giveaways, even if you're not currently on the website, including an audio alert and a popup "toast" message.

As is the case with many great add-ons, it's strange that its functionality isn't already part of the site, because it's indispensable and improves the site's usability by a good 40%. If you use SteamGifts.com, installing this add-on is pretty much mandatory.