Increasing the sell price of pickles is the clearly better choice. As many others have said, if you simply increase the composting time, you'll just end up with bigger composter farms.
But please take a moment to think out the scenario. If you adjust this, what becomes the new meta? Fishing brings in between 1k-1.5k per hour, running tunnels brings in about 2k while its uncontested, but the next biggest farm will come from selling cloth which is effective for both scrap and net worth. This will inevitably create monstrous lag-inducing structures and there will effectively be no change to the way things are currently being done.
I would prefer to encourage gameplay related activities myself (ie, encourage players to shoot things, run monuments, etc), so perhaps the best answer is to set the vendor trade quantities at bandit camp back to official settings. This should also fix the impact of the current yields of HQM from the quarry, as well as many other "if not this then that" metas that would arise (selling crude oil, selling corn, breaking other things down into HQM, etc).
Edit: also as others have said, increase the decay on twig by like 20x-50x.
Ctrl out.