the problem is the size and that 2014. if you hand paint it on there they may ignore it, but a buyer may not want your large name there. this will be framed and hanging some place, and it shouldn't have your name so huge. i sign all my work, but its small and almost hidden. as a thumbnail you don't see it at all. it should be like that. though i don't know the limits they have for signatures. i think basically if it detracts from the image, then you should make it smaller or more faded.
---Mike Savad
MikeSavad.com