Please stop trying it

Rihanna's last tour headed to a lot of the same locations last time and sold out, even then, not all right away, but by they did indeed sell out.
This tour would be no different. However DWT went on sale in September, with Unapologetic coming in November. This gave perfect time for everything to happen and is why the tour did well.
AWT was put on sale two months prior with no album, and with the way ANTI was released it has not probably had much affect on the tour itself. Most of the dates, including the cancelled ones were nearly finished selling out.
If you insist to compare the tour with Bey then let's shall we. Formation has been doing relatively well. Beyonce however has generally become a performance act, that is her niche. Rihanna on the other hand is still building to reach that as her shows are still regarded with positive to mixed reception. In the end she will be fine so long as she ensures to put on a great show from now on I don't see any issues. But I will say it is odd DWT didn't have as muchchaos but then again I think alot of these factors played apart.