one more thing I love to add is merit are not enough for you to get accepted in the campaign as some time ago I applied in Elon coin campaign and did not get accepted which means even after getting enough merit or rank you need good luck as without luck manager won't accept you.
Earning merits, ranking up and having a certain number of merits in the last 120 days will make you eligible for most campaigns, but the final decision of selecting members for a campaign is on the manager, and they make that selection based on their criterias. If you are not selected by one manager, you may be selected by another soon enough.
Be sure that if someone seems desperate to be in the campaign, it only reduces their chances of being accepted.
If is possible easily recognize merit hunting through the history of posts, forced praise of the manager, and the project for which the campaign is applied for... these are all signs of desperation, and they are certainly not something that will prevail for the manager to accept such a member