Less eye-catching than recruiting new members, Lib Dems doing really well at keeping older members
A good rule of thumb for new member recruitment in the Liberal Democrats has always been that for every two new members recruited, only one will renew one year on. After the Cleggmania 2010 mini-surge in new members, over half were lost one year on although more recently the renewal rate for new members was more like two in three rather than one in two. Even so, with the party's poll ratings currently lower than when those surge member were due to rejoin and mostly didn't, there's been a big question mark over how many of the post-2015 election surge in members the party would manage to keep.