It's a rip off. Too many fake profiles and too expensive on top of that.
Wanna have an adultery - there are better sites then Illicitencounters for sure.
The best site I discovered so far was nostringsaffair.com. It is not perfect, but way better then other ones.
135 GBP per month - for nothing. Do not join this site. 90% of profiles are fake - there are some real ladies but mostly dreamers looking for Richard Gere.