Outside download links are not allowed on MPGH. If the limit for a specific file size seems too low, compress the file into a zip/rar archive and upload it then. You shouldn't encounter file size limitations.
Each infraction expires 15 days from when received. If you receive 3 infractions within 15 days, you will receive an automatic 3 day ban. There are no restrictions imposed on your account when you receive an infraction, unless of course you are banned.