Hi,
Not sure if it's just slowed down due to COVID but I've been signed up to Flex since early Feb 2021 and only been sent one opportunity in that time which was a 2-week opportunity and didn't match my availability (you have to express an interest and then the client will pick the best candidate AFAIK, not sure how competitive each opportunity is). I certainly wouldn't budget for any form of guaranteed income with them but I'm just staying on it to see if any opportunities arise during holidays or the gap between PGDL and LPC.