It depends. Since I'm in the Philippines, I can collect my earnings (40% of total earnings per month) from GoogleAdSense every fourth month from the local branch of Western Union once it reaches $100 dollars (P5,000 pesos). I already received two payments since 2010. Just waiting for my third to come next month.I have difficulties activating my eBay and Hubpages Ad Program. I have earnings from Amazon but I am still expecting to collect it.
In the Us, I think you can collect your earnings every month including IRS taxes.
If you want more earnings, you can add other accounts but it should be different from your main account. It is allowed here in HubPages with caution.
You can have blogsite as link for your hubs, YouTube account for your videos. Google AdSense will also share its remuneration through clicks on your sites or hubs.
If you haven't enrolled at Google AdSense, you can do it now.