Before committing time to bbwdating, work out how precise the filters really are.
I gave bbwdating about 4 weeks before I formed a view, mostly watching how usable it is one-handed on a phone.
If your area is thin, it will not fix that, whatever whether the filters survive a refresh looks like.
The measure I would actually check on the site is whether the sorting can be trusted.
Worth comparing against the Souldate boards before you commit to anything.