Take through the muddy OSRS GP keys to get to the Lava Maze and only take the valuable stuff (you shouldn't consume the anchovy pizzas). This is the most efficient method to earn f2p. I estimate 400k/hr, but it takes a while to collect muddy keys. Gem bags are the best option for maximum effectiveness. Mine adamant ore. This is my favorite method of travel. Wear full batwing, shield and food won't be needed. Hop worlds. It's not common to see PKers in the area. Superheating is also possible through mining coal. This can make your trips last longer however I'm not convinced it is more efficient. 70 mining required 70 smithing, if you are superheating.

Rune arrows are a great way to take out many more monsters out of the Forinthry Dungeon. It offers 100k gp/hr and the most xp range available to players who are not paid. Air runes average about 200k/hour at 66 runecraft. The more you can earn is, the more favorable. However, I haven’t done it in some time. You should purchase a bond, earn money with one of the methods for members and only play for 1 hour per day as long as you've got good stats.

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I'm not very experienced with the money-making of members therefore here are some fun items. Kill Hill Giants are found in Edgeville's resource tunnel. Find the bones, the limpwurt roots, and other things. ~250k gp/hr last Summer. Run muddy keys to the Lava Maze, take only the most valuable items (you should not consume the anchovy pizza). This is the most lucrative opportunity to earn money through F2P. If you're lucky enough, the payout could be 400k/hr. But muddy keys can take some time to buy.

Mine adamant ore. This is my preferred method of travel. I wear my complete shield and batwing, and I don't even need food. Hop worlds. The PKers here are so rare you don't even have to think about it. You can also superheat the coal by mining it to make your journeys last longer. I'm not certain if this is the best option however. 70 mining and 70 smithing are the minimum requirements for superheating. 200-300k gp/hr.

Kill greater monsters within the Forinthry Dungeon, use rune Arrows. It's the best range of xp available to free players that I'm aware of. It also offers 100k Gp/hr. Multicombat is an excellent way to speed up your time and avoid waiting until you've killed the next demon. I believe that air runes are about 200k/hr on 66 runecraft. Of course, the higher the runecraft, the better. But I haven't tried this for a while.

Mining rune. Since they OSRS gold for sale greatly reduced the number of f2p realms I haven't mined it in several years. I mined rune around a month ago at the lava maze, occasionally jumping to F2P worlds and around half of the worlds with Pkers sat there. It's a bit of pain too, as there's no kbd lab so you're left with three choices to kill them (which is possible when they're young in your journey), or run through 20 wild. There is a lot of competition in the mining guild resource dungeon however it could be more enjoyable than the wilderness. There are a few I may have missed. I have a long list that I published somewhere however it was in the month of June in last year's.