(4.3) Licenses you are granting us: By submitting or posting User Content to the Service (either directly or through a Third Party Service) you grant this Site a royalty-free, perpetual, irrevocable, non-exclusive, sublicensable, assignable, unrestricted, worldwide license to use the User Content, together with all consents or waivers (if any) necessary to distribute, publicly perform, publicly display, transmit, communicate to the public and modify the User Content, by any means and in all media formats and channels now known or hereafter devised in perpetuity, and to advertise and promote such use, without further notice to, or permission from, you or any other person, and without compensation or reference to you or any other person.
The site has awarded itself the right to distribute creators' content as it sees fit, to modify it as it sees fit, and to prevent creators withdrawing their product from the site. It has done this without notice, and without offering creators the choice to participate or leave the site. This is almost certainly illegal under European law (and probably many others) but how many creators will have the financial clout to challenge it? Reading this paragraph, it's even possible that flightsim.to could upload content from other distribution sites and claim that it is covered by these terms.
There isn't much MAIW-related stuff on flightsim.to as yet, but there is some. I would advise MAIW creators who have contributed, directly or indirectly, to this site think carefully about whether they will do so in future. I would also advise users to exmine their consciences when downloading from this site.
Some creators have managed to substitute empty updates for their content on the site, but flightsim.to have intercepted this tactic in some cases - and they almost certainly retain archive versions of all content.
Should you wish to contribute to the conversation at the site, it can be found here.