I don't know if this is common knowledge, but if you create a new Microsoft webmaster account (I didn't have one before) they give you $100 of free Microsoft Ads credit, you don't have to spend anything to get the credits!
I'm using it for my new Slack app Incognito for Slack and it's working really well!
Google has a deal if you spend $150 you get $150 but the free $100 from Microsoft is a cool way to try to get your early users for free.
THanks for sharing!
no problem!