Hmm, may mga requirements ang mga ad providers.
Like for example si google AdSénsé.
First, dapat main website to, di pwedeng sub domain.
dapat more than 31days old I think? yung site, hmm
Ito yung iba haha
https://www.webnots.com/what-are-the-eligibility-criteria-for-google-AdSénsé/
If ikaw ay sinuswerte or influential ka, ang mga company na mismong lalapit sayo to endorse their products.
Anyway, There's a lot of way how you can earn online using your domain. Searchable naman sa internet nalahat hehe.