What is the number beside our username in our account in brackets?

that is number of discussion you responded

this is what was called rating in mylot. It increased when you response a discussion, but if you post twice in the same discussion you'll get nothing. And if you started a new discussion or you comment to someone response you'll get no rating.

That was your point/rank,.If you have more than 500 you can uploaded Photos into discussions and copy paste, but you must be smart on copy paste don't broken guidelines.

That number is from each post your responded too. It may go up and down sometimes. That is because MyLot removes some discussions. Or a glitch will keep it stuck sometimes.

This is what you call your "rating". Yes, when you reply to a discussion, it will increase but not all the time. if you are replying to a discussion that you started, it will not increase. It will not increase when starting a discussion. And, it does not increase when replying multiple times to the same discussion. At least this is what I have noticed. This is not to say you will not gain earnings as there are other discussions in myLot with examples of member's earnings increasing when the rating does not. I hope this helps.

that's the number of post you've made