I actually resell hosting plans by using one single cPanel account and many addon domains under it.

Basically for each new user I don't create a new cP account, but I simply create a new ADDON domain and give him the necessary space.

I know in this way the final user won't be able to manage his emails and he won't be able to access all cPanel features, but that's ok.

I know in my account I'm allowed to add unlimited addon domains, but adding many addon domains is there something that might happen that slows down cPanel or could create problems?

Any suggestions you could give me about the way i'm using cPanel which might not be the usual way of using it. (As for instance: "be aware that mails from different addon domains under the same CP account could create many problems.", etc.)

Thanks!