You probably ought to spend a lot of time reading ALL the docs to understand how Rocket works. Particularly look at licencing versions, costs etc.
It’s 1:1 unless you talk to them about partnerships, but they are unlikely to give you much time unless you are bringing a lot of paying customers with you.
They are not going to be interested in supporting you supporting a pile of ‘free’ Community/Starter versions. Essentially no value in it.
If you are proposing bringing in a pile of Enterprise customers then they are likely to listen.
Remember, Rocket.Chat code is open source, but that is not the same as Rocket.Chat being free.
(don’t shoot the messenger - I don’t work for Rocket but do know a but about what happens internally)