Would you recommend different creatives in an ad set? What about different ad formats in an ad set?
Yes, if you gonna spend 50 dollar on a campaign, why not test 5-10 images instead of one only? and test different variations yes.
Hello! Please specify which aim you want to achieve by running different creatives at the same time.
If you want to make a test to see which creative will have higher CTR, we recommend running different creatives in one Ad Set. You should spend at least around $3-5 per each creative to have enough data to compare statistics and choose the best one.
Facebook Ads is setup to run multiple creatives in the same ad set, as this is often a great way to test and optimize. If you are just starting out with a new offer, I'd keep in mind that the more creatives you run the more you will have to spend to get enough data. So you could start with 2-3 and go from there. I hope this helps!