I really wouldn't think about it too much. They'll easily reject you as quickly as they reached out to you. Recruiter performance evaluations are typically based in the raw number of placements rather than hit rate. It naturally skews them towards a shotgun approach.
Maybe you're a fantastic Dev but getting a call from them doesn't really mean much.
I think recruiters get paid by the number of positions they can fill, even if they get a "bad performance" for having few candidates.
I think this recruiter just was doing follow up after few months and trying to re-connect. Last year happened to me the same with a Pebble recruiter who later went to Greylock.
Maybe you're a fantastic Dev but getting a call from them doesn't really mean much.