Hotspot users

[javalero]

how many Hotspot (captive portal) clients support Pfsense with a very good server ?

[Cry Havok]

Take a look at posts in the Captive Portal forum.  The answer will depend significantly on the version of pfSense, the nature of the traffic and what you mean by "very good server" (since your definition won't be anything like mine, which probably won't be anything like other's).