Error correction helps a scanner account for portions of the code being obscured/unreadable, whereas a bad background can make a code not even recognizable as a code in the first place. (depending on the algorithm used, how bad it is, yadda yadda)

The COFA states are very strongly aligned with the US and pretty much always vote with them. I don’t know much about, say, Tonga, but I’m guessing it’s a way of signaling cooperation to the US as well.

The resolution has declaratory power only but provides international backing to those countries that want to take additional steps against Israel.

Likely only Reddit can say. I don’t think Reddit was ever trying to make money off Community Points directly (in contrast to their NFTs), but rather to boost engagement. Whether or not it did, and by enough to offset the costs of starting and maintaining the system, we’ll likely never know.