@amWhy and @mixedmath Detailed information about such limits can be found in The Complete Rate-Limiting Guide. (It is linked also in the rate-limiting tag-info.)

> 50 close/reopen votes/day/user on Stack Overflow, Mathematics, Server Fault, Super User and Ask Ubuntu, 24 on others. Source

And also this: What are the limits on how I can cast, change, and retract votes?

The post mentionsL "40 post votes per day per user." and "30 answer votes per day per user."

Although details are a bit complicated when you get close to 40.

Sorry, I pinged wrong user. The above was for amWhy and @MikePierce, who discussed this in another room.

Sorry for the ping. I started to type at m and press tab to do autocomplete the rest of the name. I did not check carefully enough what I typed.

Is this why you ping yourself sometimes?! :-)

@quid I guess it's just a joke. I'm pretty sure that autocomplete does not offer your own username.

@MartinSleziak I suppose it is easy to guess why I ping myself. The advantage of using reply (even if it is to my own message) is that other users see the little arrow next to the message and they know what exactly I am responding to (in the other words, what is the message with the self-reply related to).

@MartinSleziak For example, if I had some more comments about triage, then if I start message like this, the small arrow at the begging redirects other users to the previous context.

Indeed, my comment was intended as a humorous one and I had understood why you reply to yourself.

@user170039 Like this: chat.stackexchange.com/messages/44254385/history

It is the same syntax as when you reply to a message by somebody else, but here you have to copy-paste the number of message and preface it by ":"

As you can see, in that message I started it with ":44254365" and it was reply to the message with this number: chat.stackexchange.com/transcript/message/44254365#44254365

And that number you can get from the permalink. (Permalink and reply are among the options when you click that small triangle on the left next to a chat message.)