LF uses your DigitalOcean account to rapidly scale large numbers of simulated users to test your website, store, API, or application for cheap - between 1 and 15 cents per test.
It doesn't work at all.
You pay 50 bucks minimun and then you can't take a single test because the start will fail every time. If it happens to start, at least one worker will fail, so the test results are useful.
I managed to run tests with only a couple of users, test for 5000 users failed every time.