Chatgpt 4 message cap, some suggestions

Honestly, 50 messages cap for every three hours is not going to work for many who try to use GPT builder. Understanding there may be a capacity limit for the PLUS users, I dont mind paying for additional messages but there is no option to do so. Since OpenAI offers custom Chatgpt sale, they should be able to work out a simple payment option for an individual who wants to increase the message limit or tap additional messages.