Different restrictions exist depending on the tier you are using
No use of the Admin Portal
No use of categories
No permission management
Custom bots will not run personal skills. Personal skills will still have to be run from the AtBot bot.
Web bots will not run personal skills.
Web Bots can only be deployed via Web channel, Direct Line or SMS (Twilio) channel. You cannot load Web Bots into Teams.
*Where skills are limited, AtBot will load in the most recent skills that were created/saved from Flow.