Paid version vs Free version

Could someone please clarify the difference between the paid version and the free version of Zerotier. What benefits does the paid version has on top of free version other than what’s already mentioned in the website? Pricing – ZeroTier
Also, is there any speed difference in the connectivity? any difference in the performance and quality of connection?
Appreciate comments.

There are no differences in Paid vs Free other than what is listed on the pricing page.

Additionally, to answer your second question, please see here: FAQ | ZeroTier Documentation

ZeroTier performance is not at all related to your account or subscription level.

zt-grant
Is there any way to buy support for an issue? My iPhone lost connectivity to my ZT network and I can’t figure out what happened. There are several similar issues in the community forum but none of them reached a solution.
Thanks,
Bob