Comment Emojis vs words (Score 1) 89
Originally, "smiley faces", or "emoticons" where not used as words. They were intended to express feelings.
They are there as a substitute for intonation in conjunction with words because it is otherwise difficult to express intonation in text form.
So, the most a thumbs-up emoji can do to express entering into a contract, is to express that you are feeling positive about the contract and want to proceed.
But it does not necessarily mean that you'd want to enter it right now.