It should be pointed out that the browser has yet to be finalized but like we said, we doubt Microsoft wants to be at the cusp of release only to have to delay it due to a glaring security issue, hence the bounty program. So far it looks like the highest amount Microsoft is offering is $15,000 which is only given to hackers who can prove that remote code execution is capable.
The lowest amount Microsoft is offering is $500 which is for those who discover ASLR info disclosure vulnerability. The bounty program will run from the 22nd of April until the 22nd of June so if you think you’re up to the task of trying to find exploits in Project Spartan, then go ahead and take the Windows 10 technical preview for a spin.
In the meantime the date of the bounty’s closure is also pretty close to the month of July which is when Microsoft’s Windows 10 is expected to be released, or at least according to AMD. Presumably by then Microsoft would be in the final stages of development and should be more or less close to the consumer version of its Windows 10 platform.