Instead of replying and bumping this thread which has been sinking since 2019, why don't you read one of the answers on this one?
There is usually a warning that the post you are replying to is too old but they still ignore these warnings and keep bumping up such threads asking for the same questions.His account is 2017 registered even before the merit system implementation so he must be aware about all the rules now.
You must at least be a full member to use the avatar. In addition to activity points, you also need sufficient merit to be able to rank up to full member. This means that now you need a minimum of 88 merit again to rank up to full member and use avatars. The quality of your posts will determine that.
Don't want to sound rude but don't think he will reach there if he keeps up the same posting style as you can see he has hardly managed to gain 2 merits in past 120 days and only 12 in 5 years time span so how much will it take to reach 100 limit of full member at same pace? So they need to understand that only way is learning and sharing knowledge on the forum.