If you remove a tweak from Cydia, but you still want to receive updates of it in the future because you might be interested in it later on or if it is in the development stage that is very much possible.
In the default settings, you do not receive updates from the uninstalled tweaks on your device, which is a good thing as it prevents you from being bombarded by tweaks and updates you have absolutely no interest in.
However, as discussed above, if you do need updates from uninstalled tweaks, then that can be done through this very useful feature in Cydia. By enabling the ‘Show All Settings’ option you will receive updates of all the tweaks present in Cydia regardless of whether they are installed or not.
This overlooked yet pretty useful option is deserves praise. This way updates of tweaks available on Cydia can be monitored without being spammed by the rest of the packages.