Is that case true here that there are no post available that are worth for merits? I can search worth threads and show, even the OP if there thread I shared has very good post in his past that would have been considered right? Do you @hacker1001101001 really think that this thread was worth it. I felt that the tread I shared is over rated.
Seems you're still new to how things are been done here, most times sources don't have the time to review post to post of quality contributors so they just decide to award merit to a particular post not minding the amount sent. The user in question have done quite well for himself in such a short period of time therefore him recieving that amount of merit isn't something we show be debating about. He's a decent users and has lots of decent posts.
He isn't the first user to recieve such amount of merit on a congratulations post, numerous users have recieve same or even more amount of merit and future users are likely to recieve if only they'll be willing to put in work and contribute positively to the forum. Understand that, the merit sent on a self congratulation threads are mostly as a motivation to continue thy good work of contributing positively to the forum, it doesn't means such threads deserve the number of merit they get but the user do deserve the merit due to their previous works (posts) that must have gone unnoticed.