I don't think "mine" is the word, maybe "earn" would be more appropriate. Because it's not like you play a game to get merit or perform surveys. Two ways I know to earn merit is by;
✔️contributing thoughtfully and organically to posts on the forum
✔️ Creating and sharing valuable opinions on the forum.

AI generated content is frowned at, poor quoting and inappropriate responses are also frowned at and deleted. So yeah, you get to earn merit over time when you've built trust and authority by contributing reasonably to the forum discussion. So keep building here, sooner or later, I believe you'll earn merits ☺️