I swept all my Citi Rewards points across to SQ a few weeks ago, but that was because I wanted to make a reward booking. Like others, I'm a bit wary of the transfer rate bein "enhanced", but my earn rate would rarely be enough to sweep across each month, bearing in mind there is a minimum 15k transfer out and the Altitude Black Amex is now my primary card of choice. So I'll probably just let my points accumulate for at least the rest of the year, when I decide whether to renew the Select for another year or cancel. As things stand, it's very likely to be the latter.