I also signed up for several Sugaring websites other than SA when I first started including Secret Benefits. I want to stress that my experiences were several years ago and that things may not be the same anymore.
The site seemed mostly legit, although the email marketing I still continue to get from founder, "Herb Rose", are a weird mix of what is sometimes genuinely good advice for an aspiring SD and others something that seems pure fantasy. From the few women I talked to off the site the marketing potential SB's get is along the same lines. A mix of advice for aspiring SBs, and stories of women striking it rich with millionaire sugar daddies and being put up in penthouse apartments while they go to college or similar. The stories may all be true but they are from the very extreme ends of the sugar bell curve.
The number of women in my area of the US was fairly low compared to SA, (this was true of all the other sites as well though), and the messaging system was expensive as I recall. No option that gave you unlimited messages like an SA premium account does and had to spend a "credit" I think it was to initiate a message or read a received message. Seems like it might have also cost a credit to view profile details at the time. This was several years ago however and things may have changed.
I don't think the company are a scam but I got a lot higher percentage of contacts from scam accounts than on SA. You simply won't believe how many "nurses" that live in my area of the US are on UN missions to Africa but want to date me as soon as they get back, but in the meantime can I please send them money Western Union because they have gotten sick eating native food and for some reason the UN doesn't feed them. Oh, could you please send it to this dude named "Habubakar Jakande", because he's her "expedition commander" and since he's a native is much more qualified to handle her own money for her for some reason. (Yes I admit, I actually fell for this scam one time up until the request for cash. These guys string you along with messages for days and even send pics, stolen from random social media from what I can tell, before springing the trap.)
I think I remember they may have given me credits back when I reported scam accounts that I had used a credit to contact if they actually banned it.
Having said all of the above I did manage to contact some legit SB's in my area-ish, of those, I actually met one but we didn't really click. Not the site s fault obviously. Of the others I had lengthy off the site communications trying to work out arrangements but they never really came to anything. Again, not the sites fault. Overall, at that time the percentage of scammers and low quality contacts caused me to deactivate my account. So that's my story with them. Again, I want to stress this was several years ago, things may be very different now.