I don't currently do this however one of the easiest things I've made money with was, buying YouTube channels that were already making passive income, then either reselling them or connecting my Adsense to bank with no effort.
It's really easy to get a good deal. Passive income websites on EmpireFlippers can set you back 20x-30x average monthly profit last time I checked (industry might have changed, it's been a while since I've checked but I'll assume things are still similarly priced). I've been able to buy YouTube channels that make hundreds per month on old viral videos sometimes for as low as 4x-7x average monthly revenue. Usually they haven't been used for months if not years so the subscribers are all dead but the money can stay consistent with no maintenance work at all required potentially for years before it starts to decline. If things fuck up and revenue was to go to zero, you can still resell the channel as dead subscribers are worth money too. It's very hard to lose money on a YouTube channel.
On the blackhat end, creating top 5 style videos for products is really fucking profitable. You can use cheap templates, take footage from the product trailers, etc. optimize on page as usual, and rank them for low to medium competition keywords using the standard ranking methods. Promote the products you feature in description on Amazon for that affiliate money and monetize with YouTube/Adsense. The click through rate for the description links can be good as you're targeting rankings for buyer related keywords. You can make hundreds per month with very little effort but if you're focused you can build a significant income.
If you're broke, YouTube is still very easy to make money with, in my opinion. If you have some capital to work with, investing in channels that make money passively, or flipping YouTube channels that have lots of subscribers or consistent revenue, can both be great hustles.
With that money I'm gonna go nuts with ppc.
