If you get like .001 SBD more often that not it is someone advertising themselves trying to get attention. I know a lot of the .001 senders can be spammers or annoying users so I just ignore them because they aren't often quality contacts. I know if I just use my phone's browser I can't see the memo field. If I download the actual phone app for Steemit "ESTEEM" then it lets me see the full memo field. Also, on my laptop it lets me see the memo field. Not sure how you are looking at steemit's page but cell phone browsers often cut off the memo field.