1. I think this is because S/he joined this forum a month ago, create 42 posts, and 4 of his posts deleted[1], so S/he thought there were restrictions on posting "as restrictions on activity."
2. paid signature.

It is better to read the rules and stay away from creating useless topics.

[1] https://bpip.org/profile.aspx?p=vuthuanhai1990