I believe you can ask some freelancers (copywriter/rewriter) to make that job for you. There are methods to make your comments unique using words in the same meaning. You can also try to do this by yourself using spintax tools.
Look combinations formula C(n,k)=n!/(k!(n - k)!). If you need, for example, 5 bunches of words (k) for your comment line with 21 keywords (n) for each word, then you can get C(21,5)=20349 combinations

Or you can use 7 bunches of words with 17 keywords for each word and get 19448 combinations.
Use any online combinations calculator to get the correct amount of combinations. As you can see, the number of keywords for each bunch depends on how many words there are in a comment line you need.
Also think some time about the unique percentage that you will get, because some of your comment lines will begin with the same words like:
also check and follow other humor account here @your_account_name
also check and follow another humor profile there @your_account_name
also check and follow super humor page on IG @your_account_name
also check and follow ultra humor site @your_account_name
etc.. and similar.
Hope I give you the key, so you can think about it
Also, it may be better to create new thread in
Want to buy forum.