I think instead of creating too many X accounts at once, you should focus on creating new accounts and running them properly. You need to warm up in the first five to seven days, complete your profile, add a profile picture, bio, post five to ten normal tweets and do real activity like likes, retweets. If the goal is to send direct messages to people, then it is important to keep the account activity natural, following and unfollowing too much or sending a large number of messages in a short time can create problems for the account. My advice is to start with a few accounts and then gradually increase, along with following the rules of X and avoid spam-like activities. If you want traffic, it is better to promote them by posting good content instead of direct spam DMs. It is more beneficial to run them well instead of using too many accounts.