Yep, and no need to mention the [race-to-the-bottom] site. Just check their website, contact info, maybe jobs/careers section, and contact anyway. And again, consider doubling/tripling your rate.

For short-term quick jobs - daily (better weekly) charging is preferable.

For long-term-like-regular-job - I prefer hourly billing, because I usually work part-time and with a hourly setup I have a freedom.