The Hull-based pair have more than 375,000 followers and they earn up to £1,587 per post, which amounts to £76,162 a year.
Pete Sandiford has the second-highest following with 281,000 fans, and he earns £57,998 a year from his uploads.
Tom Malone, who left the series for the most recent season, is in third place with a yearly Instagram salary of £54,077.
His parents regularly feature in his posts and he has become a TikTok sensation over lockdown.
Sophie Sandiford is next in line, with more than 245,000 followers, and she earns £50,568 a year from Instagram.