There are plenty of ways to still make decent profit in this crashing economy. However, they just take more time, input, and effort and the botter's behalf.
Sorc Garden was so popular because of how easy it was to start up. You literally could make an entirely new user, xfer over all materials to finish Prince Ali and complete the quest in 15 minutes (I've done it as fast as 10 when doing consecutively).
Collecting Squirks to 65 Thieving took less than a day, and than BAM, a solid 250-350k/hr depending on your success rate.
The other methods that can make you 500k-3m/hr through botting just take higher stats, quests, and a small investment of GP to armor/food/etc.
Hopefully Herb prices will go back up so SG will at least be 150k-200k, but looking at how many bots are still in each world, and less of a demand for herblore levels, it's not looking too good.