The spelling of the word "Reyd" is quite interesting as it doesn't follow the conventional English spelling rules. In fact, it's pronounced as /reɪd/ which means it follows the long vowel sound of "ay" in the IPA phonetic transcription. The spelling, therefore, seems to be a phonetic adaptation of the English language sound. It could be possible that the word "Reid" was modified to "Reyd" to give it a unique and distinguishing appearance for a company, brand or product in today's marketing-driven world.