You know, you can be awarded FIDE Grandmaster by winning certain tournaments* – it happened, for example, with IM/WGM Mariya Muzychuk** who won the Women's World Championship so she got the GM title. Similarly, the winner of the Lichess Marathon should be granted LM. What do you think?
*en.wikipedia.org/wiki/Grandmaster_%28chess%29#Current_regulations
**en.wikipedia.org/wiki/Mariya_Muzychuk#Career
*en.wikipedia.org/wiki/Grandmaster_%28chess%29#Current_regulations
**en.wikipedia.org/wiki/Mariya_Muzychuk#Career