I just don't think it's a simple "if A then B" case of "well then everyone would pay to be top level, and nobody would run levelling roulette any more except first-time newbies".
Roulettes (including levelling) have incentive rewards that can be adjusted as-needed if SE is worried about the number of players participating. They have tools to solve this problem that are not simply "don't implement jump potions". Wondrous Tails is an existing example of something like this (encouraging people to run old duties for currency and vanity rewards).
And it's not just newbies/people forbidden by the game from doing so who wouldn't use the potions, either - people who genuinely enjoy levelling, who rolled an alt because they want the experience of (re)playing the story, or who (assuming a WoW-style model) are too poor to spend more than the subscription cost on this game, are still going to be levelling alts the long way around.
The target audience of WoW-style jump potions is generally people who have more spare money than spare time, who want to play with their existing friends ASAP, and who would quit playing the game for boredom/loneliness if they had to spend a week or three getting to the stage where that was possible. There's lots of people who fall outside of that, and who would therefore still be doing things the old-fashioned way even if jump potions were freely purchasable with no restrictions on how many could be used per account.
Roulettes (including levelling) have incentive rewards that can be adjusted as-needed if SE is worried about the number of players participating. They have tools to solve this problem that are not simply "don't implement jump potions". Wondrous Tails is an existing example of something like this (encouraging people to run old duties for currency and vanity rewards).
And it's not just newbies/people forbidden by the game from doing so who wouldn't use the potions, either - people who genuinely enjoy levelling, who rolled an alt because they want the experience of (re)playing the story, or who (assuming a WoW-style model) are too poor to spend more than the subscription cost on this game, are still going to be levelling alts the long way around.
The target audience of WoW-style jump potions is generally people who have more spare money than spare time, who want to play with their existing friends ASAP, and who would quit playing the game for boredom/loneliness if they had to spend a week or three getting to the stage where that was possible. There's lots of people who fall outside of that, and who would therefore still be doing things the old-fashioned way even if jump potions were freely purchasable with no restrictions on how many could be used per account.