The most informative sentence about Roblox Plus isn't in the announcement. It's in the creator documentation, addressed to developers worried about their revenue: when a Plus member buys your 100-Robux game pass at a discount, you earn the same amount per purchase as you would from non-subscribers. The member pays 90, the creator is paid on 100, and Roblox eats the difference.
Sit with that for a second, because companies do not habitually eat differences. Roblox retired a subscription that handed out Robux unconditionally and replaced it with one whose entire benefit is a discount Roblox itself funds. That is not generosity twice over. It's a swap of one kind of cost for a much better-behaved one, and understanding the swap is how you decide whether the $4.99 is for you.
The allowance problem
Premium was an allowance. Subscribe, and 450 or 1,000 or 2,200 Robux arrived every month whether you played daily or forgot the platform existed. From the subscriber's side this was the product's charm - the arithmetic was simple and often favorable. From Roblox's side it was a standing liability: every dormant subscriber was collecting Robux they might spend someday, at terms locked years ago, while the actually-lucrative purchase bonus nudged people toward buying even more.
A coupon has none of these problems. The discount costs Roblox nothing until the moment you spend, scales exactly with engagement, and - the elegant part - makes spending feel cheaper at the moment of decision, which is where purchase behavior actually bends. The docs say the quiet part plainly enough when they pitch creators: lower prices for Plus subscribers "can encourage more frequent purchases." The discount isn't a rebate on your spending. It's an investment in increasing it.
None of this makes Plus a bad deal. It makes Plus a conditional deal, and conditions can be computed.
Where the break-even actually sits
Plus costs $4.99 a month and discounts eligible Robux-priced purchases - game passes, developer products, paid access, avatar items - by 10% in your first two months and 20% beginning in your third consecutive month. Saved Robux is only worth what you'd otherwise pay for Robux, and if you're optimizing at all you're buying on the website at roughly $9.99 per 1,000. Run it at that rate (or run your own numbers):
At the full 20%, you need about 2,500 Robux of eligible spending a month - roughly $25 of list-price purchasing - before the discount covers the fee. During the two intro months at 10%, the bar is double: about 5,000 Robux a month. Spend 1,000 Robux in a typical month and Plus at full strength saves you 200 Robux, worth about $2 - you're paying $4.99 for $2 of value and a profile badge. Spend 5,000 a month and the 20% tier hands you 1,000 Robux of savings, about $10 against $4.99, and the subscription is simply correct.
The population math follows directly: Plus is designed for heavy spenders, funded by moderate ones. The casual player who subscribes "to support the platform" and buys one 400-Robux pass a month is the margin.
The ramp is the product
Notice the shape of the 10-to-20 ladder. The good rate doesn't arrive until month three, and it's tied to consecutive months - lapse and you restart at 10%. Nearly everyone runs at a loss through the intro period; the product only reaches full strength for people who never let go of it. Premium was indifferent to your loyalty - the stipend was the stipend. Plus prices loyalty explicitly, which is why the toggle-it-when-I-need-it strategy that worked fine for Premium is precisely the strategy Plus is built to punish.
The bundles extend the same logic. Plus 500, 1000, and 2000 staple a monthly Robux allocation onto the feature set at a higher price - a stipend, reinvented as an upsell, at prices Roblox hasn't even published as one global sheet. Before taking one, subtract the $4.99 base and price the remaining Robux against what Robux costs you anyway. Sometimes the bundle wins. It is not entitled to.
The people standing still
Which brings us to the grandfathered Premium members, the one group with a genuinely interesting decision. They keep the old allowance and their trading access, they lost the purchase bonus in May, and - per Roblox's support documentation - cancellation is one-way. There is no rejoining Premium; the only road back is Plus. A stipend subscription nobody can buy anymore is, in a small way, a scarce good, and the correct instinct with scarce goods is to not let a lapsed credit card decide for you. The break-even tool prices the stipend; the one-way door you have to price yourself.
For everyone else the summary is short. Plus is honest arithmetic wearing a loyalty program's clothes: a real discount if your spending clears the bar, a $4.99 tip to Roblox if it doesn't, and a design that knows most subscribers won't check which side they're on. What a Robux is worth hasn't changed. What changed is that Roblox stopped paying you to exist and started paying you to spend - and only one of those was ever going to last.