I am guessing, based on their action 4 days ago (when all this fkry started) of obviously researching using some service for it (deleted a comment, yet another reply indicates his intention).
https://steemd.com/steem/@yuriks2000/re-carlobelgado-re-yuriks2000-tip-all-you-active-followers-on-steemit-for-free-with-tipper-20170804t174705859z