I'm happy when they don't say "thank-you". That lets me know that my attempt to help that particular poster was of no value, so I won't waste my time trying to help them again. There are so many good people who could use free help, and so little time to take care of them all. We have to be selective.

Even if nobody thanked me for something I've done I'll be fine 🤔 why would I be angry I did it because I want to in the first place if I didn't want i could have not done it  if I do it to be appreciated or want people to thank me that is another thing

Not thanking someone who helps you is rude. At least in my culture and I´m sure that´s true in most cultures. I do a lot of correcting and even though I do it to help and not to receive a "thank you", I agree with what others have already mentioned, that it doesn't speak well of the person asking for help. 

Even though we're in this anonymous internet world, I think we should still treat each other respectfully. If someone sees you struggling with your groceries and helps you put them in your car, would you really just drive away without even acknowledging the person?

In general, i do believe that saying "Thanks" to others for corrections is very important. It will encourage them to help others :)