I thought Grafana was doing great with its managed offerings. Personally I'd prefer you consider BSL before SSPL since it's usually clearer to most people.
bsl is interesting, but license proliferation and familiarity is a big factor to consider.
now that both elastic and mongo are both using sspl, it is more appealing. i think tsl from timescale is also a great and well thought out license.
it's definitely a nuanced discussion internally.