One of the oldest and most iconic OSRS botting methods of all time is spinning flax. This method is pay to pay and requires very low skill levels to perform.
The skill levels required to spin flax are quite easy to obtain. You will need 10 crafting to start spinning flax and will gain you 21000 crafting exp per hour.
For this method you can use any flax spinning botting script like Auto Flax Spinner from RSPeer or Quick Flax Spinner from Powerbot. The only serious choice you need to make is what botting client you want to use. A few good botting clients that have a low ban rate are Tribot, RSPeer, and OSBot. As always, if you employ proper botting practices and use your brain while botting you should be fine using any decent bot.
Spinning flaxcan earn you around 250k gold per hour. This means if you run 100 bots at once you can expect around 25m an hour. This at current market rates ($0.62 per mill) makes you $15.5 per hour. If you run these bots non stop for a day you should earn around $372 per day or $11160 per week. In total, you can expect to earn around $1000 a month running 100 flax spinner bots 24/7 when you take ban and proxy costs into account.