They teach you the legend dance.
Do you get anything from legend league?

I had no idea what the whole league system was until today. I would ignore the achievements because I didn't care. However, I looked at my league today to find that I'm most likely going to reach legend tomorrow. After doing some research, I found an article about a contest where you can win money by getting to legend league. The article was from 2 years ago, so I wanted to know if that was for promoting a new feature or if they still have contests.
There's currently nothing special when reaching Legend other than an Achievement. That contest was only for the release of the League feature and ended in February of that year.

Can you please point to some link/competition that had prizes?

you get into a special club that only people that have reached the legend league have access to. Other than that, it's just the satisfaction of knowing that you were better than everyone else.

you get into a special club that only people that have reached the legend league have access to. Other than that, it's just the satisfaction of knowing that you were better than everyone else.
Actually, it's playing more games than everyone else.

Actually it's winning more games than everyone else.
Getting more trophies.
So winning and drawing games but generally in a competitive division, it's going to come down to playing a lot of games.
I agree with the above about playing more games. I remained in the Champions league for a long time with 150-350 points because work and courses didn't allow me to play the number of games I would need. I win about 45-55% of my games (depending on how often I play). Last week I had an extended week off following New Year, and decided to play a lot to see if I could manage it. I did, but it took about 25-30 games/day throughout the week, which I could never manage in a normal week.

I had no idea what the whole league system was until today. I would ignore the achievements because I didn't care. However, I looked at my league today to find that I'm most likely going to reach legend tomorrow. After doing some research, I found an article about a contest where you can win money by getting to legend league. The article was from 2 years ago, so I wanted to know if that was for promoting a new feature or if they still have contests.