There are the traditional methods for generating in game wealth.
Obviously farming, purchasing and reselling, crafting. You can also hop on the Hamidon train and get your daily merits. Reward Merits can be rewarding as well.
But before we think about how to generate mega-wealth think about the community and think what there is to gain from categories. Note any great endeavor requires some kind of effort on your own part...influence doesn't just magically appear!
There are many categories here are some.
RP: Costume Contests and Events have prize money. Play around with costumes at level 1 and make some cool costumes and park them in Atlas! Pay attention to daily events posted and get involved in the community. Learn where events are being held and get involved to participate. The whole reason they hold events and give away influence is to help you, help the community, and draw in crowds to have some fun!
Base Building: Check out Dacy the CR of Base Building and look into learning how to build a base, in game realty is a real thing and people pay BIG INFLUENCE to have structures built. If you don't want to mindlessly farm creatures for influence or work the market create an artistic masterpiece and sell it.
Raiding: Hamidon, MSR, iTrials, etc.
PVP: Get good and have someone hire you as their thug protector. LOL
Crafting: Get Into Crafting Buy Low, Craft, Sell High.
Just some basic ideas, some are outside of the box, others are pretty common answers.