Is LRC a good coin? I found it on my MEW. Appear lot of events for this coin comming

Why most airdrop must donate, or maybe it only optional?  Should i donate?

Loop ring right?? You can check their website and see the use case for their project then determine if it's worth it or not.

If you have to donate to get coins don't do it and just leave this airdrop but if donation is not mandatory you can still join such airdrop.

Seems like it's back on

You guys need to be careful with Airdrop, I got hacked recently by one of these by downloading their wallet. next time make sure that you have an antivirus scanner

There's a great coin called DeepOnion that is halfway through their Airdrop run. You must have at least 100 coins in your DeepOnion wallet before you can participate. People who are not committed to the coin won't be interested. That leaves plenty of opportunities for the people who are serious and privacy minded. The link is in my signature if you want to check it out.