@blahblahblah23,
My sugar arrangements over the last 9 years have lasted from as little as one BCD meeting, to well over two years. With two outlier sugar babies that I still see two or three times a year for the last 6 to 8 years. It's probably not as useful to fixate on an average length (pun intended :p) as you might think, since every arrangement is affected by a lot of variables. And as implied above, not all arrangements end with finality.
As to putting "dancer" in your profile, that will probably generate many more replies from guys looking for strictly "hook up" arrangements, rather than GF-Date-Companion arrangements. If you don't include it in your profile, I recommend you still disclose it after or during your 1st meet & greet. Sugar is about transparency, and lies will bite you later. Note also that the site has de-stressed the use of the "Occupation" field in profiles, so it's not unusual to see this field left blank on profiles.
So, what are you looking for? Lots of guys to hook up and get quick (if not repeatable) cash? Or fewer guys (or just one) who will be more like a part-time BF that take you to diner/shopping/travel, and also helps with the bills, then leaves you alone for a week or two? No judgement on either, I've met both types and everything in between (plus many ROB's).
I'm suggesting you consider what you really want first and then post a profile that will appeal to your preferred types. Either way, you will still need to wade through assholes, jerks, creepy pic collectors, salt-daddies (i.e.: broke), and perhaps wannabe pimps and such to find a good connection. But if you put in the time, and carefully vette you can find what you want.
Pro tip: The more the guy (and for daddies the girl) wants to accelerate to sex (I mean really pressures for a meet NOW) the more likely you will be dissatisfied with the experience, or worse.