It depends on the gig, the price and my available time. Generally speaking it’s two 5 minute revisions on a $10 article but I would probably reduce it to one if I had a lot of buyers asking for it. It’s not like the early days when I couldn’t afford to just say no. Most of my writing buyers are regulars now and they only ask for a revision if we really misunderstood each other or I made an error in concept.
I can be generous with 2 brief revisions allowed since it’s so rare anyone uses either one and they know if it’s going to take more than 10 minutes to do the two, I’m going to send a quote for the added time. My research/finder gig doesn’t have any revisions since I have it all over the gig that I can give you XYZ and if I can’t, it’s an automatic cancel. That gig is my favorite because it’s so straightforward!
I don’t blame you for not offering revisions overall. Your gigs seems so straightforward too, they get what they get and most of it should be a quick transaction. Those kind of gigs seem to fit a lot better on Fiverr than any kind of very complex job with a lot of moving parts.