Adobe already charges $39 for support. They would profit from providing support for a Flash 10.1 version for N900.
N900 users are as "Techie" as techie can get. If we are forced to create effective ways around the need for Flash then that will trickle down to other devices. If you've grown used to a IU you tend to stick with it, so you would want the same "effective ways around the need for Flash" in your other devices. That (along with Apple) helps kill off Flash.

Adobe created Flash 9.4 for Maemo 5. They have the code they need and with any of the Linux versions they have already created could easily produce a Maemo 5 version of Flash 10.1 for the N900. Heck, to shut us up they could simply take Flash 9.4 and make a few small changes, have it show as 10.1 and keep us from having to find other ways which don't require Adobe software to access information.

The market share of a device doesn't seem to mean much to Adobe when it comes to Flash. 64-Bit versions of Windows OS have been around for many years now but there is not now nor has there been a version of Flash for it (only the 32-bit Windows version). There is a Beta version of Flash 10.1 for Linux 64-bit though. If a broad audience were their concern, why wouldn't they create a Windows 64-bit Flash 10.1 before a Linux 64-bit? Very few people are currently using Linux 64 because of a serious lack of 64 bit device drivers for the OS.