This summer has definitely been slow.
I think it is a smart idea to follow the money, though. Register on Prolific Academic and any other similar sites that have credibility and make what you can make.
Sites like Prolific are somewhat slow but they do add up over time. Every penny helps. This is my summary over there for the past couple of years:
Total submissions 1,259
Submissions approved 1,164
Total earned £1,362.45
*I also just noticed that 'submissions' includes hits you return over there. I freaked for a second since I have never had a single rejection on Prolific.