Product dimension maximum number of members allowed.

Everything is possible, but it depends on the overall setup of the cube. If that's the only User Dimension you need and you only have 50 Accounts and 2 Flows, sure, it won't be a problem; if you have another 4 or 5 UDs with thousands of members and a massive chart of Accounts, things will probably get sticky.

That's why we tend to recommend keeping large dimensions ( > x000 members) outside of the cube, as Henning suggested: because it will typically work consistently, regardless of cube architecture.